21037980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{521}}^1\times {\mathrm{673}}^1$

素因数の和:1206

約数の個数: 48

約数和(自身を含む): 59107104

約数和(自身を除く): 38069124

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 521, 673, 1042, 1346, 1563, 2019, 2084, 2605, 2692, 3126, 3365, 4038, 5210, 6252, 6730, 7815, 8076, 10095, 10420, 13460, 15630, 20190, 31260, 40380, 350633, 701266, 1051899, 1402532, 1753165, 2103798, 3506330, 4207596, 5259495, 7012660, 10518990, 21037980]

約数ペア:

[(1, 21037980), (2, 10518990), (3, 7012660), (4, 5259495), (5, 4207596), (6, 3506330), (10, 2103798), (12, 1753165), (15, 1402532), (20, 1051899), (30, 701266), (60, 350633), (521, 40380), (673, 31260), (1042, 20190), (1346, 15630), (1563, 13460), (2019, 10420), (2084, 10095), (2605, 8076), (2692, 7815), (3126, 6730), (3365, 6252), (4038, 5210)]