20368240

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{191}}^1$

素因数の和:278

約数の個数: 80

約数和(自身を含む): 50282496

約数和(自身を除く): 29914256

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 43, 62, 80, 86, 124, 155, 172, 191, 215, 248, 310, 344, 382, 430, 496, 620, 688, 764, 860, 955, 1240, 1333, 1528, 1720, 1910, 2480, 2666, 3056, 3440, 3820, 5332, 5921, 6665, 7640, 8213, 10664, 11842, 13330, 15280, 16426, 21328, 23684, 26660, 29605, 32852, 41065, 47368, 53320, 59210, 65704, 82130, 94736, 106640, 118420, 131408, 164260, 236840, 254603, 328520, 473680, 509206, 657040, 1018412, 1273015, 2036824, 2546030, 4073648, 5092060, 10184120, 20368240]

約数ペア:

[(1, 20368240), (2, 10184120), (4, 5092060), (5, 4073648), (8, 2546030), (10, 2036824), (16, 1273015), (20, 1018412), (31, 657040), (40, 509206), (43, 473680), (62, 328520), (80, 254603), (86, 236840), (124, 164260), (155, 131408), (172, 118420), (191, 106640), (215, 94736), (248, 82130), (310, 65704), (344, 59210), (382, 53320), (430, 47368), (496, 41065), (620, 32852), (688, 29605), (764, 26660), (860, 23684), (955, 21328), (1240, 16426), (1333, 15280), (1528, 13330), (1720, 11842), (1910, 10664), (2480, 8213), (2666, 7640), (3056, 6665), (3440, 5921), (3820, 5332)]