20456940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{919}}^1$

素因数の和:991

約数の個数: 96

約数和(自身を含む): 66769920

約数和(自身を除く): 46312980

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 53, 60, 70, 84, 105, 106, 140, 159, 210, 212, 265, 318, 371, 420, 530, 636, 742, 795, 919, 1060, 1113, 1484, 1590, 1838, 1855, 2226, 2757, 3180, 3676, 3710, 4452, 4595, 5514, 5565, 6433, 7420, 9190, 11028, 11130, 12866, 13785, 18380, 19299, 22260, 25732, 27570, 32165, 38598, 48707, 55140, 64330, 77196, 96495, 97414, 128660, 146121, 192990, 194828, 243535, 292242, 340949, 385980, 487070, 584484, 681898, 730605, 974140, 1022847, 1363796, 1461210, 1704745, 2045694, 2922420, 3409490, 4091388, 5114235, 6818980, 10228470, 20456940]

約数ペア:

[(1, 20456940), (2, 10228470), (3, 6818980), (4, 5114235), (5, 4091388), (6, 3409490), (7, 2922420), (10, 2045694), (12, 1704745), (14, 1461210), (15, 1363796), (20, 1022847), (21, 974140), (28, 730605), (30, 681898), (35, 584484), (42, 487070), (53, 385980), (60, 340949), (70, 292242), (84, 243535), (105, 194828), (106, 192990), (140, 146121), (159, 128660), (210, 97414), (212, 96495), (265, 77196), (318, 64330), (371, 55140), (420, 48707), (530, 38598), (636, 32165), (742, 27570), (795, 25732), (919, 22260), (1060, 19299), (1113, 18380), (1484, 13785), (1590, 12866), (1838, 11130), (1855, 11028), (2226, 9190), (2757, 7420), (3180, 6433), (3676, 5565), (3710, 5514), (4452, 4595)]