20902725

素因数分解:

$3^3\times 5^2\times {\mathrm{173}}^1\times {\mathrm{179}}^1$

素因数の和:371

約数の個数: 48

約数和(自身を含む): 38836800

約数和(自身を除く): 17934075

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 135, 173, 179, 225, 519, 537, 675, 865, 895, 1557, 1611, 2595, 2685, 4325, 4475, 4671, 4833, 7785, 8055, 12975, 13425, 23355, 24165, 30967, 38925, 40275, 92901, 116775, 120825, 154835, 278703, 464505, 774175, 836109, 1393515, 2322525, 4180545, 6967575, 20902725]

約数ペア:

[(1, 20902725), (3, 6967575), (5, 4180545), (9, 2322525), (15, 1393515), (25, 836109), (27, 774175), (45, 464505), (75, 278703), (135, 154835), (173, 120825), (179, 116775), (225, 92901), (519, 40275), (537, 38925), (675, 30967), (865, 24165), (895, 23355), (1557, 13425), (1611, 12975), (2595, 8055), (2685, 7785), (4325, 4833), (4475, 4671)]