21490175

素因数分解:

$5^2\times 7^2\times {\mathrm{53}}^1\times {\mathrm{331}}^1$

素因数の和:408

約数の個数: 36

約数和(自身を含む): 31678776

約数和(自身を除く): 10188601

約数列:

[1, 5, 7, 25, 35, 49, 53, 175, 245, 265, 331, 371, 1225, 1325, 1655, 1855, 2317, 2597, 8275, 9275, 11585, 12985, 16219, 17543, 57925, 64925, 81095, 87715, 122801, 405475, 438575, 614005, 859607, 3070025, 4298035, 21490175]

約数ペア:

[(1, 21490175), (5, 4298035), (7, 3070025), (25, 859607), (35, 614005), (49, 438575), (53, 405475), (175, 122801), (245, 87715), (265, 81095), (331, 64925), (371, 57925), (1225, 17543), (1325, 16219), (1655, 12985), (1855, 11585), (2317, 9275), (2597, 8275)]