19644080

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^2$

素因数の和:222

約数の個数: 60

約数和(自身を含む): 47681472

約数和(自身を除く): 28037392

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 89, 124, 155, 178, 248, 310, 356, 445, 496, 620, 712, 890, 1240, 1424, 1780, 2480, 2759, 3560, 5518, 7120, 7921, 11036, 13795, 15842, 22072, 27590, 31684, 39605, 44144, 55180, 63368, 79210, 110360, 126736, 158420, 220720, 245551, 316840, 491102, 633680, 982204, 1227755, 1964408, 2455510, 3928816, 4911020, 9822040, 19644080]

約数ペア:

[(1, 19644080), (2, 9822040), (4, 4911020), (5, 3928816), (8, 2455510), (10, 1964408), (16, 1227755), (20, 982204), (31, 633680), (40, 491102), (62, 316840), (80, 245551), (89, 220720), (124, 158420), (155, 126736), (178, 110360), (248, 79210), (310, 63368), (356, 55180), (445, 44144), (496, 39605), (620, 31684), (712, 27590), (890, 22072), (1240, 15842), (1424, 13795), (1780, 11036), (2480, 7921), (2759, 7120), (3560, 5518)]