21665800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^2\times {\mathrm{641}}^1$

素因数の和:683

約数の個数: 72

約数和(自身を含む): 54630990

約数和(自身を除く): 32965190

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 169, 200, 260, 325, 338, 520, 641, 650, 676, 845, 1282, 1300, 1352, 1690, 2564, 2600, 3205, 3380, 4225, 5128, 6410, 6760, 8333, 8450, 12820, 16025, 16666, 16900, 25640, 32050, 33332, 33800, 41665, 64100, 66664, 83330, 108329, 128200, 166660, 208325, 216658, 333320, 416650, 433316, 541645, 833300, 866632, 1083290, 1666600, 2166580, 2708225, 4333160, 5416450, 10832900, 21665800]

約数ペア:

[(1, 21665800), (2, 10832900), (4, 5416450), (5, 4333160), (8, 2708225), (10, 2166580), (13, 1666600), (20, 1083290), (25, 866632), (26, 833300), (40, 541645), (50, 433316), (52, 416650), (65, 333320), (100, 216658), (104, 208325), (130, 166660), (169, 128200), (200, 108329), (260, 83330), (325, 66664), (338, 64100), (520, 41665), (641, 33800), (650, 33332), (676, 32050), (845, 25640), (1282, 16900), (1300, 16666), (1352, 16025), (1690, 12820), (2564, 8450), (2600, 8333), (3205, 6760), (3380, 6410), (4225, 5128)]