20917575

素因数分解:

$3^3\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{233}}^1$

素因数の和:278

約数の個数: 96

約数和(自身を含む): 46425600

約数和(自身を除く): 25508025

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 25, 27, 35, 45, 57, 63, 75, 95, 105, 133, 135, 171, 175, 189, 225, 233, 285, 315, 399, 475, 513, 525, 665, 675, 699, 855, 945, 1165, 1197, 1425, 1575, 1631, 1995, 2097, 2565, 3325, 3495, 3591, 4275, 4427, 4725, 4893, 5825, 5985, 6291, 8155, 9975, 10485, 12825, 13281, 14679, 17475, 17955, 22135, 24465, 29925, 30989, 31455, 39843, 40775, 44037, 52425, 66405, 73395, 89775, 92967, 110675, 119529, 122325, 154945, 157275, 199215, 220185, 278901, 332025, 366975, 464835, 597645, 774725, 836703, 996075, 1100925, 1394505, 2324175, 2988225, 4183515, 6972525, 20917575]

約数ペア:

[(1, 20917575), (3, 6972525), (5, 4183515), (7, 2988225), (9, 2324175), (15, 1394505), (19, 1100925), (21, 996075), (25, 836703), (27, 774725), (35, 597645), (45, 464835), (57, 366975), (63, 332025), (75, 278901), (95, 220185), (105, 199215), (133, 157275), (135, 154945), (171, 122325), (175, 119529), (189, 110675), (225, 92967), (233, 89775), (285, 73395), (315, 66405), (399, 52425), (475, 44037), (513, 40775), (525, 39843), (665, 31455), (675, 30989), (699, 29925), (855, 24465), (945, 22135), (1165, 17955), (1197, 17475), (1425, 14679), (1575, 13281), (1631, 12825), (1995, 10485), (2097, 9975), (2565, 8155), (3325, 6291), (3495, 5985), (3591, 5825), (4275, 4893), (4427, 4725)]