21539960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1801}}^1$

素因数の和:1848

約数の個数: 64

約数和(自身を含む): 54492480

約数和(自身を除く): 32952520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 23, 26, 40, 46, 52, 65, 92, 104, 115, 130, 184, 230, 260, 299, 460, 520, 598, 920, 1196, 1495, 1801, 2392, 2990, 3602, 5980, 7204, 9005, 11960, 14408, 18010, 23413, 36020, 41423, 46826, 72040, 82846, 93652, 117065, 165692, 187304, 207115, 234130, 331384, 414230, 468260, 538499, 828460, 936520, 1076998, 1656920, 2153996, 2692495, 4307992, 5384990, 10769980, 21539960]

約数ペア:

[(1, 21539960), (2, 10769980), (4, 5384990), (5, 4307992), (8, 2692495), (10, 2153996), (13, 1656920), (20, 1076998), (23, 936520), (26, 828460), (40, 538499), (46, 468260), (52, 414230), (65, 331384), (92, 234130), (104, 207115), (115, 187304), (130, 165692), (184, 117065), (230, 93652), (260, 82846), (299, 72040), (460, 46826), (520, 41423), (598, 36020), (920, 23413), (1196, 18010), (1495, 14408), (1801, 11960), (2392, 9005), (2990, 7204), (3602, 5980)]