21379875

素因数分解:

$3^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:173

約数の個数: 64

約数和(自身を含む): 39896064

約数和(自身を除く): 18516189

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 71, 73, 75, 125, 165, 213, 219, 275, 355, 365, 375, 781, 803, 825, 1065, 1095, 1375, 1775, 1825, 2343, 2409, 3905, 4015, 4125, 5183, 5325, 5475, 8875, 9125, 11715, 12045, 15549, 19525, 20075, 25915, 26625, 27375, 57013, 58575, 60225, 77745, 97625, 100375, 129575, 171039, 285065, 292875, 301125, 388725, 647875, 855195, 1425325, 1943625, 4275975, 7126625, 21379875]

約数ペア:

[(1, 21379875), (3, 7126625), (5, 4275975), (11, 1943625), (15, 1425325), (25, 855195), (33, 647875), (55, 388725), (71, 301125), (73, 292875), (75, 285065), (125, 171039), (165, 129575), (213, 100375), (219, 97625), (275, 77745), (355, 60225), (365, 58575), (375, 57013), (781, 27375), (803, 26625), (825, 25915), (1065, 20075), (1095, 19525), (1375, 15549), (1775, 12045), (1825, 11715), (2343, 9125), (2409, 8875), (3905, 5475), (4015, 5325), (4125, 5183)]