178389820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1\times {\mathrm{139}}^1$

素因数の和:347

約数の個数: 96

約数和(自身を含む): 440294400

約数和(自身を除く): 261904580

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 89, 103, 139, 140, 178, 206, 278, 356, 412, 445, 515, 556, 623, 695, 721, 890, 973, 1030, 1246, 1390, 1442, 1780, 1946, 2060, 2492, 2780, 2884, 3115, 3605, 3892, 4865, 6230, 7210, 9167, 9730, 12371, 12460, 14317, 14420, 18334, 19460, 24742, 28634, 36668, 45835, 49484, 57268, 61855, 64169, 71585, 86597, 91670, 100219, 123710, 128338, 143170, 173194, 183340, 200438, 247420, 256676, 286340, 320845, 346388, 400876, 432985, 501095, 641690, 865970, 1002190, 1274213, 1283380, 1731940, 2004380, 2548426, 5096852, 6371065, 8919491, 12742130, 17838982, 25484260, 35677964, 44597455, 89194910, 178389820]

約数ペア:

[(1, 178389820), (2, 89194910), (4, 44597455), (5, 35677964), (7, 25484260), (10, 17838982), (14, 12742130), (20, 8919491), (28, 6371065), (35, 5096852), (70, 2548426), (89, 2004380), (103, 1731940), (139, 1283380), (140, 1274213), (178, 1002190), (206, 865970), (278, 641690), (356, 501095), (412, 432985), (445, 400876), (515, 346388), (556, 320845), (623, 286340), (695, 256676), (721, 247420), (890, 200438), (973, 183340), (1030, 173194), (1246, 143170), (1390, 128338), (1442, 123710), (1780, 100219), (1946, 91670), (2060, 86597), (2492, 71585), (2780, 64169), (2884, 61855), (3115, 57268), (3605, 49484), (3892, 45835), (4865, 36668), (6230, 28634), (7210, 24742), (9167, 19460), (9730, 18334), (12371, 14420), (12460, 14317)]