21613520

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1$

素因数の和:220

約数の個数: 80

約数和(自身を含む): 52770432

約数和(自身を除く): 31156912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 61, 80, 86, 103, 122, 172, 206, 215, 244, 305, 344, 412, 430, 488, 515, 610, 688, 824, 860, 976, 1030, 1220, 1648, 1720, 2060, 2440, 2623, 3440, 4120, 4429, 4880, 5246, 6283, 8240, 8858, 10492, 12566, 13115, 17716, 20984, 22145, 25132, 26230, 31415, 35432, 41968, 44290, 50264, 52460, 62830, 70864, 88580, 100528, 104920, 125660, 177160, 209840, 251320, 270169, 354320, 502640, 540338, 1080676, 1350845, 2161352, 2701690, 4322704, 5403380, 10806760, 21613520]

約数ペア:

[(1, 21613520), (2, 10806760), (4, 5403380), (5, 4322704), (8, 2701690), (10, 2161352), (16, 1350845), (20, 1080676), (40, 540338), (43, 502640), (61, 354320), (80, 270169), (86, 251320), (103, 209840), (122, 177160), (172, 125660), (206, 104920), (215, 100528), (244, 88580), (305, 70864), (344, 62830), (412, 52460), (430, 50264), (488, 44290), (515, 41968), (610, 35432), (688, 31415), (824, 26230), (860, 25132), (976, 22145), (1030, 20984), (1220, 17716), (1648, 13115), (1720, 12566), (2060, 10492), (2440, 8858), (2623, 8240), (3440, 6283), (4120, 5246), (4429, 4880)]