21317360

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{3373}}^1$

素因数の和:3465

約数の個数: 40

約数和(自身を含む): 50205120

約数和(自身を除く): 28887760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 3373, 6320, 6746, 13492, 16865, 26984, 33730, 53968, 67460, 134920, 266467, 269840, 532934, 1065868, 1332335, 2131736, 2664670, 4263472, 5329340, 10658680, 21317360]

約数ペア:

[(1, 21317360), (2, 10658680), (4, 5329340), (5, 4263472), (8, 2664670), (10, 2131736), (16, 1332335), (20, 1065868), (40, 532934), (79, 269840), (80, 266467), (158, 134920), (316, 67460), (395, 53968), (632, 33730), (790, 26984), (1264, 16865), (1580, 13492), (3160, 6746), (3373, 6320)]