21640470

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{397}}^1$

素因数の和:509

約数の個数: 64

約数和(自身を含む): 55019520

約数和(自身を除く): 33379050

約数列:

[1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 79, 115, 138, 158, 230, 237, 345, 395, 397, 474, 690, 790, 794, 1185, 1191, 1817, 1985, 2370, 2382, 3634, 3970, 5451, 5955, 9085, 9131, 10902, 11910, 18170, 18262, 27255, 27393, 31363, 45655, 54510, 54786, 62726, 91310, 94089, 136965, 156815, 188178, 273930, 313630, 470445, 721349, 940890, 1442698, 2164047, 3606745, 4328094, 7213490, 10820235, 21640470]

約数ペア:

[(1, 21640470), (2, 10820235), (3, 7213490), (5, 4328094), (6, 3606745), (10, 2164047), (15, 1442698), (23, 940890), (30, 721349), (46, 470445), (69, 313630), (79, 273930), (115, 188178), (138, 156815), (158, 136965), (230, 94089), (237, 91310), (345, 62726), (395, 54786), (397, 54510), (474, 45655), (690, 31363), (790, 27393), (794, 27255), (1185, 18262), (1191, 18170), (1817, 11910), (1985, 10902), (2370, 9131), (2382, 9085), (3634, 5955), (3970, 5451)]