20177775

素因数分解:

$3^3\times 5^2\times {\mathrm{167}}^1\times {\mathrm{179}}^1$

素因数の和:365

約数の個数: 48

約数和(自身を含む): 37497600

約数和(自身を除く): 17319825

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 135, 167, 179, 225, 501, 537, 675, 835, 895, 1503, 1611, 2505, 2685, 4175, 4475, 4509, 4833, 7515, 8055, 12525, 13425, 22545, 24165, 29893, 37575, 40275, 89679, 112725, 120825, 149465, 269037, 448395, 747325, 807111, 1345185, 2241975, 4035555, 6725925, 20177775]

約数ペア:

[(1, 20177775), (3, 6725925), (5, 4035555), (9, 2241975), (15, 1345185), (25, 807111), (27, 747325), (45, 448395), (75, 269037), (135, 149465), (167, 120825), (179, 112725), (225, 89679), (501, 40275), (537, 37575), (675, 29893), (835, 24165), (895, 22545), (1503, 13425), (1611, 12525), (2505, 8055), (2685, 7515), (4175, 4833), (4475, 4509)]