18701840

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1489}}^1$

素因数の和:1659

約数の個数: 40

約数和(自身を含む): 43788120

約数和(自身を除く): 25086280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1489, 1570, 2512, 2978, 3140, 5956, 6280, 7445, 11912, 12560, 14890, 23824, 29780, 59560, 119120, 233773, 467546, 935092, 1168865, 1870184, 2337730, 3740368, 4675460, 9350920, 18701840]

約数ペア:

[(1, 18701840), (2, 9350920), (4, 4675460), (5, 3740368), (8, 2337730), (10, 1870184), (16, 1168865), (20, 935092), (40, 467546), (80, 233773), (157, 119120), (314, 59560), (628, 29780), (785, 23824), (1256, 14890), (1489, 12560), (1570, 11912), (2512, 7445), (2978, 6280), (3140, 5956)]