21004828

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{2711}}^1$

素因数の和:2877

約数の個数: 24

約数和(自身を含む): 39866400

約数和(自身を除く): 18861572

約数列:

[1, 2, 4, 13, 26, 52, 149, 298, 596, 1937, 2711, 3874, 5422, 7748, 10844, 35243, 70486, 140972, 403939, 807878, 1615756, 5251207, 10502414, 21004828]

約数ペア:

[(1, 21004828), (2, 10502414), (4, 5251207), (13, 1615756), (26, 807878), (52, 403939), (149, 140972), (298, 70486), (596, 35243), (1937, 10844), (2711, 7748), (3874, 5422)]