21755240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1$

素因数の和:171

約数の個数: 128

約数和(自身を含む): 58786560

約数和(自身を除く): 37031320

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 23, 26, 34, 40, 46, 52, 65, 68, 85, 92, 104, 107, 115, 130, 136, 170, 184, 214, 221, 230, 260, 299, 340, 391, 428, 442, 460, 520, 535, 598, 680, 782, 856, 884, 920, 1070, 1105, 1196, 1391, 1495, 1564, 1768, 1819, 1955, 2140, 2210, 2392, 2461, 2782, 2990, 3128, 3638, 3910, 4280, 4420, 4922, 5083, 5564, 5980, 6955, 7276, 7820, 8840, 9095, 9844, 10166, 11128, 11960, 12305, 13910, 14552, 15640, 18190, 19688, 20332, 23647, 24610, 25415, 27820, 31993, 36380, 40664, 41837, 47294, 49220, 50830, 55640, 63986, 72760, 83674, 94588, 98440, 101660, 118235, 127972, 159965, 167348, 189176, 203320, 209185, 236470, 255944, 319930, 334696, 418370, 472940, 543881, 639860, 836740, 945880, 1087762, 1279720, 1673480, 2175524, 2719405, 4351048, 5438810, 10877620, 21755240]

約数ペア:

[(1, 21755240), (2, 10877620), (4, 5438810), (5, 4351048), (8, 2719405), (10, 2175524), (13, 1673480), (17, 1279720), (20, 1087762), (23, 945880), (26, 836740), (34, 639860), (40, 543881), (46, 472940), (52, 418370), (65, 334696), (68, 319930), (85, 255944), (92, 236470), (104, 209185), (107, 203320), (115, 189176), (130, 167348), (136, 159965), (170, 127972), (184, 118235), (214, 101660), (221, 98440), (230, 94588), (260, 83674), (299, 72760), (340, 63986), (391, 55640), (428, 50830), (442, 49220), (460, 47294), (520, 41837), (535, 40664), (598, 36380), (680, 31993), (782, 27820), (856, 25415), (884, 24610), (920, 23647), (1070, 20332), (1105, 19688), (1196, 18190), (1391, 15640), (1495, 14552), (1564, 13910), (1768, 12305), (1819, 11960), (1955, 11128), (2140, 10166), (2210, 9844), (2392, 9095), (2461, 8840), (2782, 7820), (2990, 7276), (3128, 6955), (3638, 5980), (3910, 5564), (4280, 5083), (4420, 4922)]