20427220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{367}}^1$

素因数の和:421

約数の個数: 72

約数和(自身を含む): 49335552

約数和(自身を除く): 28908332

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 44, 46, 55, 92, 110, 115, 121, 220, 230, 242, 253, 367, 460, 484, 506, 605, 734, 1012, 1210, 1265, 1468, 1835, 2420, 2530, 2783, 3670, 4037, 5060, 5566, 7340, 8074, 8441, 11132, 13915, 16148, 16882, 20185, 27830, 33764, 40370, 42205, 44407, 55660, 80740, 84410, 88814, 92851, 168820, 177628, 185702, 222035, 371404, 444070, 464255, 888140, 928510, 1021361, 1857020, 2042722, 4085444, 5106805, 10213610, 20427220]

約数ペア:

[(1, 20427220), (2, 10213610), (4, 5106805), (5, 4085444), (10, 2042722), (11, 1857020), (20, 1021361), (22, 928510), (23, 888140), (44, 464255), (46, 444070), (55, 371404), (92, 222035), (110, 185702), (115, 177628), (121, 168820), (220, 92851), (230, 88814), (242, 84410), (253, 80740), (367, 55660), (460, 44407), (484, 42205), (506, 40370), (605, 33764), (734, 27830), (1012, 20185), (1210, 16882), (1265, 16148), (1468, 13915), (1835, 11132), (2420, 8441), (2530, 8074), (2783, 7340), (3670, 5566), (4037, 5060)]