20078047640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{396173}}^1$

素因数の和:396372

約数の個数: 64

約数和(自身を含む): 51914640960

約数和(自身を除く): 31836593320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 181, 280, 362, 724, 905, 1267, 1448, 1810, 2534, 3620, 5068, 6335, 7240, 10136, 12670, 25340, 50680, 396173, 792346, 1584692, 1980865, 2773211, 3169384, 3961730, 5546422, 7923460, 11092844, 13866055, 15846920, 22185688, 27732110, 55464220, 71707313, 110928440, 143414626, 286829252, 358536565, 501951191, 573658504, 717073130, 1003902382, 1434146260, 2007804764, 2509755955, 2868292520, 4015609528, 5019511910, 10039023820, 20078047640]

約数ペア:

[(1, 20078047640), (2, 10039023820), (4, 5019511910), (5, 4015609528), (7, 2868292520), (8, 2509755955), (10, 2007804764), (14, 1434146260), (20, 1003902382), (28, 717073130), (35, 573658504), (40, 501951191), (56, 358536565), (70, 286829252), (140, 143414626), (181, 110928440), (280, 71707313), (362, 55464220), (724, 27732110), (905, 22185688), (1267, 15846920), (1448, 13866055), (1810, 11092844), (2534, 7923460), (3620, 5546422), (5068, 3961730), (6335, 3169384), (7240, 2773211), (10136, 1980865), (12670, 1584692), (25340, 792346), (50680, 396173)]