21739490

素因数分解:

$2^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{457}}^1$

素因数の和:602

約数の個数: 32

約数和(自身を含む): 40362624

約数和(自身を除く): 18623134

約数列:

[1, 2, 5, 10, 67, 71, 134, 142, 335, 355, 457, 670, 710, 914, 2285, 4570, 4757, 9514, 23785, 30619, 32447, 47570, 61238, 64894, 153095, 162235, 306190, 324470, 2173949, 4347898, 10869745, 21739490]

約数ペア:

[(1, 21739490), (2, 10869745), (5, 4347898), (10, 2173949), (67, 324470), (71, 306190), (134, 162235), (142, 153095), (335, 64894), (355, 61238), (457, 47570), (670, 32447), (710, 30619), (914, 23785), (2285, 9514), (4570, 4757)]