21000891285

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{179}}^1\times {\mathrm{743}}^1$

素因数の和:984

約数の個数: 144

約数和(自身を含む): 41678582400

約数和(自身を除く): 20677691115

約数列:

[1, 3, 5, 9, 11, 15, 29, 33, 45, 55, 87, 99, 121, 145, 165, 179, 261, 319, 363, 435, 495, 537, 605, 743, 895, 957, 1089, 1305, 1595, 1611, 1815, 1969, 2229, 2685, 2871, 3509, 3715, 4785, 5191, 5445, 5907, 6687, 8055, 8173, 9845, 10527, 11145, 14355, 15573, 17545, 17721, 21547, 21659, 24519, 25955, 29535, 31581, 33435, 40865, 46719, 52635, 57101, 64641, 64977, 73557, 77865, 88605, 89903, 107735, 108295, 122595, 132997, 157905, 171303, 193923, 194931, 233595, 237017, 269709, 285505, 323205, 324885, 367785, 398991, 449515, 513909, 628111, 664985, 711051, 809127, 856515, 969615, 974655, 1185085, 1196973, 1348545, 1462967, 1884333, 1994955, 2133153, 2569545, 2607187, 3140555, 3555255, 3856913, 4045635, 4388901, 5652999, 5984865, 7314835, 7821561, 9421665, 10665765, 11570739, 13035935, 13166703, 16092637, 19284565, 21944505, 23464683, 28264995, 34712217, 39107805, 42426043, 48277911, 57853695, 65833515, 80463185, 117323415, 127278129, 144833733, 173561085, 212130215, 241389555, 381834387, 466686473, 636390645, 724168665, 1400059419, 1909171935, 2333432365, 4200178257, 7000297095, 21000891285]

約数ペア:

[(1, 21000891285), (3, 7000297095), (5, 4200178257), (9, 2333432365), (11, 1909171935), (15, 1400059419), (29, 724168665), (33, 636390645), (45, 466686473), (55, 381834387), (87, 241389555), (99, 212130215), (121, 173561085), (145, 144833733), (165, 127278129), (179, 117323415), (261, 80463185), (319, 65833515), (363, 57853695), (435, 48277911), (495, 42426043), (537, 39107805), (605, 34712217), (743, 28264995), (895, 23464683), (957, 21944505), (1089, 19284565), (1305, 16092637), (1595, 13166703), (1611, 13035935), (1815, 11570739), (1969, 10665765), (2229, 9421665), (2685, 7821561), (2871, 7314835), (3509, 5984865), (3715, 5652999), (4785, 4388901), (5191, 4045635), (5445, 3856913), (5907, 3555255), (6687, 3140555), (8055, 2607187), (8173, 2569545), (9845, 2133153), (10527, 1994955), (11145, 1884333), (14355, 1462967), (15573, 1348545), (17545, 1196973), (17721, 1185085), (21547, 974655), (21659, 969615), (24519, 856515), (25955, 809127), (29535, 711051), (31581, 664985), (33435, 628111), (40865, 513909), (46719, 449515), (52635, 398991), (57101, 367785), (64641, 324885), (64977, 323205), (73557, 285505), (77865, 269709), (88605, 237017), (89903, 233595), (107735, 194931), (108295, 193923), (122595, 171303), (132997, 157905)]