21661420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8951}}^1$

素因数の和:8982

約数の個数: 36

約数和(自身を含む): 50005872

約数和(自身を除く): 28344452

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8951, 17902, 35804, 44755, 89510, 98461, 179020, 196922, 393844, 492305, 984610, 1083071, 1969220, 2166142, 4332284, 5415355, 10830710, 21661420]

約数ペア:

[(1, 21661420), (2, 10830710), (4, 5415355), (5, 4332284), (10, 2166142), (11, 1969220), (20, 1083071), (22, 984610), (44, 492305), (55, 393844), (110, 196922), (121, 179020), (220, 98461), (242, 89510), (484, 44755), (605, 35804), (1210, 17902), (2420, 8951)]