20621510

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:118

約数の個数: 128

約数和(自身を含む): 51093504

約数和(自身を除く): 30471994

約数列:

[1, 2, 5, 7, 10, 13, 14, 17, 26, 31, 34, 35, 43, 62, 65, 70, 85, 86, 91, 119, 130, 155, 170, 182, 215, 217, 221, 238, 301, 310, 403, 430, 434, 442, 455, 527, 559, 595, 602, 731, 806, 910, 1054, 1085, 1105, 1118, 1190, 1333, 1462, 1505, 1547, 2015, 2170, 2210, 2635, 2666, 2795, 2821, 3010, 3094, 3655, 3689, 3913, 4030, 5117, 5270, 5590, 5642, 6665, 6851, 7310, 7378, 7735, 7826, 9331, 9503, 10234, 13330, 13702, 14105, 15470, 17329, 18445, 18662, 19006, 19565, 22661, 25585, 28210, 34255, 34658, 36890, 39130, 45322, 46655, 47515, 47957, 51170, 66521, 68510, 86645, 93310, 95030, 95914, 113305, 121303, 133042, 158627, 173290, 226610, 239785, 242606, 294593, 317254, 332605, 479570, 589186, 606515, 665210, 793135, 1213030, 1472965, 1586270, 2062151, 2945930, 4124302, 10310755, 20621510]

約数ペア:

[(1, 20621510), (2, 10310755), (5, 4124302), (7, 2945930), (10, 2062151), (13, 1586270), (14, 1472965), (17, 1213030), (26, 793135), (31, 665210), (34, 606515), (35, 589186), (43, 479570), (62, 332605), (65, 317254), (70, 294593), (85, 242606), (86, 239785), (91, 226610), (119, 173290), (130, 158627), (155, 133042), (170, 121303), (182, 113305), (215, 95914), (217, 95030), (221, 93310), (238, 86645), (301, 68510), (310, 66521), (403, 51170), (430, 47957), (434, 47515), (442, 46655), (455, 45322), (527, 39130), (559, 36890), (595, 34658), (602, 34255), (731, 28210), (806, 25585), (910, 22661), (1054, 19565), (1085, 19006), (1105, 18662), (1118, 18445), (1190, 17329), (1333, 15470), (1462, 14105), (1505, 13702), (1547, 13330), (2015, 10234), (2170, 9503), (2210, 9331), (2635, 7826), (2666, 7735), (2795, 7378), (2821, 7310), (3010, 6851), (3094, 6665), (3655, 5642), (3689, 5590), (3913, 5270), (4030, 5117)]