21491080

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1117}}^1$

素因数の和:1178

約数の個数: 64

約数和(自身を含む): 53529840

約数和(自身を除く): 32038760

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 37, 40, 52, 65, 74, 104, 130, 148, 185, 260, 296, 370, 481, 520, 740, 962, 1117, 1480, 1924, 2234, 2405, 3848, 4468, 4810, 5585, 8936, 9620, 11170, 14521, 19240, 22340, 29042, 41329, 44680, 58084, 72605, 82658, 116168, 145210, 165316, 206645, 290420, 330632, 413290, 537277, 580840, 826580, 1074554, 1653160, 2149108, 2686385, 4298216, 5372770, 10745540, 21491080]

約数ペア:

[(1, 21491080), (2, 10745540), (4, 5372770), (5, 4298216), (8, 2686385), (10, 2149108), (13, 1653160), (20, 1074554), (26, 826580), (37, 580840), (40, 537277), (52, 413290), (65, 330632), (74, 290420), (104, 206645), (130, 165316), (148, 145210), (185, 116168), (260, 82658), (296, 72605), (370, 58084), (481, 44680), (520, 41329), (740, 29042), (962, 22340), (1117, 19240), (1480, 14521), (1924, 11170), (2234, 9620), (2405, 8936), (3848, 5585), (4468, 4810)]