21349875

素因数分解:

$3^1\times 5^3\times {\mathrm{17}}^2\times {\mathrm{197}}^1$

素因数の和:249

約数の個数: 48

約数和(自身を含む): 37930464

約数和(自身を除く): 16580589

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 125, 197, 255, 289, 375, 425, 591, 867, 985, 1275, 1445, 2125, 2955, 3349, 4335, 4925, 6375, 7225, 10047, 14775, 16745, 21675, 24625, 36125, 50235, 56933, 73875, 83725, 108375, 170799, 251175, 284665, 418625, 853995, 1255875, 1423325, 4269975, 7116625, 21349875]

約数ペア:

[(1, 21349875), (3, 7116625), (5, 4269975), (15, 1423325), (17, 1255875), (25, 853995), (51, 418625), (75, 284665), (85, 251175), (125, 170799), (197, 108375), (255, 83725), (289, 73875), (375, 56933), (425, 50235), (591, 36125), (867, 24625), (985, 21675), (1275, 16745), (1445, 14775), (2125, 10047), (2955, 7225), (3349, 6375), (4335, 4925)]