21658780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{7573}}^1$

素因数の和:7606

約数の個数: 48

約数和(自身を含む): 53442144

約数和(自身を除く): 31783364

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 7573, 15146, 30292, 37865, 75730, 83303, 98449, 151460, 166606, 196898, 333212, 393796, 416515, 492245, 833030, 984490, 1082939, 1666060, 1968980, 2165878, 4331756, 5414695, 10829390, 21658780]

約数ペア:

[(1, 21658780), (2, 10829390), (4, 5414695), (5, 4331756), (10, 2165878), (11, 1968980), (13, 1666060), (20, 1082939), (22, 984490), (26, 833030), (44, 492245), (52, 416515), (55, 393796), (65, 333212), (110, 196898), (130, 166606), (143, 151460), (220, 98449), (260, 83303), (286, 75730), (572, 37865), (715, 30292), (1430, 15146), (2860, 7573)]