21303940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{8009}}^1$

素因数の和:8044

約数の個数: 48

約数和(自身を含む): 53827200

約数和(自身を除く): 32523260

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 8009, 16018, 32036, 40045, 56063, 80090, 112126, 152171, 160180, 224252, 280315, 304342, 560630, 608684, 760855, 1065197, 1121260, 1521710, 2130394, 3043420, 4260788, 5325985, 10651970, 21303940]

約数ペア:

[(1, 21303940), (2, 10651970), (4, 5325985), (5, 4260788), (7, 3043420), (10, 2130394), (14, 1521710), (19, 1121260), (20, 1065197), (28, 760855), (35, 608684), (38, 560630), (70, 304342), (76, 280315), (95, 224252), (133, 160180), (140, 152171), (190, 112126), (266, 80090), (380, 56063), (532, 40045), (665, 32036), (1330, 16018), (2660, 8009)]