28489220

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{211}}^1$

素因数の和:420

約数の個数: 48

約数和(自身を含む): 61900608

約数和(自身を除く): 33411388

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 157, 172, 211, 215, 314, 422, 430, 628, 785, 844, 860, 1055, 1570, 2110, 3140, 4220, 6751, 9073, 13502, 18146, 27004, 33127, 33755, 36292, 45365, 66254, 67510, 90730, 132508, 135020, 165635, 181460, 331270, 662540, 1424461, 2848922, 5697844, 7122305, 14244610, 28489220]

約数ペア:

[(1, 28489220), (2, 14244610), (4, 7122305), (5, 5697844), (10, 2848922), (20, 1424461), (43, 662540), (86, 331270), (157, 181460), (172, 165635), (211, 135020), (215, 132508), (314, 90730), (422, 67510), (430, 66254), (628, 45365), (785, 36292), (844, 33755), (860, 33127), (1055, 27004), (1570, 18146), (2110, 13502), (3140, 9073), (4220, 6751)]