31388980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1613}}^1$

素因数の和:1768

約数の個数: 48

約数和(自身を含む): 75922560

約数和(自身を除く): 44533580

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 695, 973, 1390, 1613, 1946, 2780, 3226, 3892, 4865, 6452, 8065, 9730, 11291, 16130, 19460, 22582, 32260, 45164, 56455, 112910, 224207, 225820, 448414, 896828, 1121035, 1569449, 2242070, 3138898, 4484140, 6277796, 7847245, 15694490, 31388980]

約数ペア:

[(1, 31388980), (2, 15694490), (4, 7847245), (5, 6277796), (7, 4484140), (10, 3138898), (14, 2242070), (20, 1569449), (28, 1121035), (35, 896828), (70, 448414), (139, 225820), (140, 224207), (278, 112910), (556, 56455), (695, 45164), (973, 32260), (1390, 22582), (1613, 19460), (1946, 16130), (2780, 11291), (3226, 9730), (3892, 8065), (4865, 6452)]