21357960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13691}}^1$

素因数の和:13718

約数の個数: 64

約数和(自身を含む): 69007680

約数和(自身を除く): 47649720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13691, 27382, 41073, 54764, 68455, 82146, 109528, 136910, 164292, 177983, 205365, 273820, 328584, 355966, 410730, 533949, 547640, 711932, 821460, 889915, 1067898, 1423864, 1642920, 1779830, 2135796, 2669745, 3559660, 4271592, 5339490, 7119320, 10678980, 21357960]

約数ペア:

[(1, 21357960), (2, 10678980), (3, 7119320), (4, 5339490), (5, 4271592), (6, 3559660), (8, 2669745), (10, 2135796), (12, 1779830), (13, 1642920), (15, 1423864), (20, 1067898), (24, 889915), (26, 821460), (30, 711932), (39, 547640), (40, 533949), (52, 410730), (60, 355966), (65, 328584), (78, 273820), (104, 205365), (120, 177983), (130, 164292), (156, 136910), (195, 109528), (260, 82146), (312, 68455), (390, 54764), (520, 41073), (780, 27382), (1560, 13691)]