19974760

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{359}}^1$

素因数の和:490

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 29014040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 107, 130, 214, 260, 359, 428, 520, 535, 718, 856, 1070, 1391, 1436, 1795, 2140, 2782, 2872, 3590, 4280, 4667, 5564, 6955, 7180, 9334, 11128, 13910, 14360, 18668, 23335, 27820, 37336, 38413, 46670, 55640, 76826, 93340, 153652, 186680, 192065, 307304, 384130, 499369, 768260, 998738, 1536520, 1997476, 2496845, 3994952, 4993690, 9987380, 19974760]

約数ペア:

[(1, 19974760), (2, 9987380), (4, 4993690), (5, 3994952), (8, 2496845), (10, 1997476), (13, 1536520), (20, 998738), (26, 768260), (40, 499369), (52, 384130), (65, 307304), (104, 192065), (107, 186680), (130, 153652), (214, 93340), (260, 76826), (359, 55640), (428, 46670), (520, 38413), (535, 37336), (718, 27820), (856, 23335), (1070, 18668), (1391, 14360), (1436, 13910), (1795, 11128), (2140, 9334), (2782, 7180), (2872, 6955), (3590, 5564), (4280, 4667)]