21609540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{271}}^1\times {\mathrm{443}}^1$

素因数の和:729

約数の個数: 72

約数和(自身を含む): 65939328

約数和(自身を除く): 44329788

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 271, 443, 542, 813, 886, 1084, 1329, 1355, 1626, 1772, 2215, 2439, 2658, 2710, 3252, 3987, 4065, 4430, 4878, 5316, 5420, 6645, 7974, 8130, 8860, 9756, 12195, 13290, 15948, 16260, 19935, 24390, 26580, 39870, 48780, 79740, 120053, 240106, 360159, 480212, 600265, 720318, 1080477, 1200530, 1440636, 1800795, 2160954, 2401060, 3601590, 4321908, 5402385, 7203180, 10804770, 21609540]

約数ペア:

[(1, 21609540), (2, 10804770), (3, 7203180), (4, 5402385), (5, 4321908), (6, 3601590), (9, 2401060), (10, 2160954), (12, 1800795), (15, 1440636), (18, 1200530), (20, 1080477), (30, 720318), (36, 600265), (45, 480212), (60, 360159), (90, 240106), (180, 120053), (271, 79740), (443, 48780), (542, 39870), (813, 26580), (886, 24390), (1084, 19935), (1329, 16260), (1355, 15948), (1626, 13290), (1772, 12195), (2215, 9756), (2439, 8860), (2658, 8130), (2710, 7974), (3252, 6645), (3987, 5420), (4065, 5316), (4430, 4878)]