28072940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{839}}^1$

素因数の和:1094

約数の個数: 48

約数和(自身を含む): 67737600

約数和(自身を除く): 39664660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 239, 478, 839, 956, 1195, 1673, 1678, 2390, 3346, 3356, 4195, 4780, 5873, 6692, 8365, 8390, 11746, 16730, 16780, 23492, 29365, 33460, 58730, 117460, 200521, 401042, 802084, 1002605, 1403647, 2005210, 2807294, 4010420, 5614588, 7018235, 14036470, 28072940]

約数ペア:

[(1, 28072940), (2, 14036470), (4, 7018235), (5, 5614588), (7, 4010420), (10, 2807294), (14, 2005210), (20, 1403647), (28, 1002605), (35, 802084), (70, 401042), (140, 200521), (239, 117460), (478, 58730), (839, 33460), (956, 29365), (1195, 23492), (1673, 16780), (1678, 16730), (2390, 11746), (3346, 8390), (3356, 8365), (4195, 6692), (4780, 5873)]