213478420

素因数分解:

$2^2\times 5^1\times {\mathrm{1951}}^1\times {\mathrm{5471}}^1$

素因数の和:7431

約数の個数: 24

約数和(自身を含む): 448616448

約数和(自身を除く): 235138028

約数列:

[1, 2, 4, 5, 10, 20, 1951, 3902, 5471, 7804, 9755, 10942, 19510, 21884, 27355, 39020, 54710, 109420, 10673921, 21347842, 42695684, 53369605, 106739210, 213478420]

約数ペア:

[(1, 213478420), (2, 106739210), (4, 53369605), (5, 42695684), (10, 21347842), (20, 10673921), (1951, 109420), (3902, 54710), (5471, 39020), (7804, 27355), (9755, 21884), (10942, 19510)]