20505870

素因数分解:

$2^1\times 3^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{269}}^1$

素因数の和:311

約数の個数: 144

約数和(自身を含む): 67223520

約数和(自身を除く): 46717650

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 11, 14, 15, 18, 21, 22, 30, 33, 35, 42, 45, 55, 63, 66, 70, 77, 90, 99, 105, 110, 121, 126, 154, 165, 198, 210, 231, 242, 269, 315, 330, 363, 385, 462, 495, 538, 605, 630, 693, 726, 770, 807, 847, 990, 1089, 1155, 1210, 1345, 1386, 1614, 1694, 1815, 1883, 2178, 2310, 2421, 2541, 2690, 2959, 3465, 3630, 3766, 4035, 4235, 4842, 5082, 5445, 5649, 5918, 6930, 7623, 8070, 8470, 8877, 9415, 10890, 11298, 12105, 12705, 14795, 15246, 16947, 17754, 18830, 20713, 24210, 25410, 26631, 28245, 29590, 32549, 33894, 38115, 41426, 44385, 53262, 56490, 62139, 65098, 76230, 84735, 88770, 97647, 103565, 124278, 133155, 162745, 169470, 186417, 195294, 207130, 227843, 266310, 292941, 310695, 325490, 372834, 455686, 488235, 585882, 621390, 683529, 932085, 976470, 1139215, 1367058, 1464705, 1864170, 2050587, 2278430, 2929410, 3417645, 4101174, 6835290, 10252935, 20505870]

約数ペア:

[(1, 20505870), (2, 10252935), (3, 6835290), (5, 4101174), (6, 3417645), (7, 2929410), (9, 2278430), (10, 2050587), (11, 1864170), (14, 1464705), (15, 1367058), (18, 1139215), (21, 976470), (22, 932085), (30, 683529), (33, 621390), (35, 585882), (42, 488235), (45, 455686), (55, 372834), (63, 325490), (66, 310695), (70, 292941), (77, 266310), (90, 227843), (99, 207130), (105, 195294), (110, 186417), (121, 169470), (126, 162745), (154, 133155), (165, 124278), (198, 103565), (210, 97647), (231, 88770), (242, 84735), (269, 76230), (315, 65098), (330, 62139), (363, 56490), (385, 53262), (462, 44385), (495, 41426), (538, 38115), (605, 33894), (630, 32549), (693, 29590), (726, 28245), (770, 26631), (807, 25410), (847, 24210), (990, 20713), (1089, 18830), (1155, 17754), (1210, 16947), (1345, 15246), (1386, 14795), (1614, 12705), (1694, 12105), (1815, 11298), (1883, 10890), (2178, 9415), (2310, 8877), (2421, 8470), (2541, 8070), (2690, 7623), (2959, 6930), (3465, 5918), (3630, 5649), (3766, 5445), (4035, 5082), (4235, 4842)]