28707980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{53}}^2\times {\mathrm{73}}^1$

素因数の和:195

約数の個数: 72

約数和(自身を含む): 71185632

約数和(自身を除く): 42477652

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 53, 70, 73, 106, 140, 146, 212, 265, 292, 365, 371, 511, 530, 730, 742, 1022, 1060, 1460, 1484, 1855, 2044, 2555, 2809, 3710, 3869, 5110, 5618, 7420, 7738, 10220, 11236, 14045, 15476, 19345, 19663, 27083, 28090, 38690, 39326, 54166, 56180, 77380, 78652, 98315, 108332, 135415, 196630, 205057, 270830, 393260, 410114, 541660, 820228, 1025285, 1435399, 2050570, 2870798, 4101140, 5741596, 7176995, 14353990, 28707980]

約数ペア:

[(1, 28707980), (2, 14353990), (4, 7176995), (5, 5741596), (7, 4101140), (10, 2870798), (14, 2050570), (20, 1435399), (28, 1025285), (35, 820228), (53, 541660), (70, 410114), (73, 393260), (106, 270830), (140, 205057), (146, 196630), (212, 135415), (265, 108332), (292, 98315), (365, 78652), (371, 77380), (511, 56180), (530, 54166), (730, 39326), (742, 38690), (1022, 28090), (1060, 27083), (1460, 19663), (1484, 19345), (1855, 15476), (2044, 14045), (2555, 11236), (2809, 10220), (3710, 7738), (3869, 7420), (5110, 5618)]