129389980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1\times {\mathrm{463}}^1$

素因数の和:718

約数の個数: 48

約数和(自身を含む): 277119360

約数和(自身を除く): 147729380

約数列:

[1, 2, 4, 5, 10, 20, 89, 157, 178, 314, 356, 445, 463, 628, 785, 890, 926, 1570, 1780, 1852, 2315, 3140, 4630, 9260, 13973, 27946, 41207, 55892, 69865, 72691, 82414, 139730, 145382, 164828, 206035, 279460, 290764, 363455, 412070, 726910, 824140, 1453820, 6469499, 12938998, 25877996, 32347495, 64694990, 129389980]

約数ペア:

[(1, 129389980), (2, 64694990), (4, 32347495), (5, 25877996), (10, 12938998), (20, 6469499), (89, 1453820), (157, 824140), (178, 726910), (314, 412070), (356, 363455), (445, 290764), (463, 279460), (628, 206035), (785, 164828), (890, 145382), (926, 139730), (1570, 82414), (1780, 72691), (1852, 69865), (2315, 55892), (3140, 41207), (4630, 27946), (9260, 13973)]