20493180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{443}}^1$

素因数の和:715

約数の個数: 72

約数和(自身を含む): 62545392

約数和(自身を除く): 42052212

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 257, 443, 514, 771, 886, 1028, 1285, 1329, 1542, 1772, 2215, 2313, 2570, 2658, 3084, 3855, 3987, 4430, 4626, 5140, 5316, 6645, 7710, 7974, 8860, 9252, 11565, 13290, 15420, 15948, 19935, 23130, 26580, 39870, 46260, 79740, 113851, 227702, 341553, 455404, 569255, 683106, 1024659, 1138510, 1366212, 1707765, 2049318, 2277020, 3415530, 4098636, 5123295, 6831060, 10246590, 20493180]

約数ペア:

[(1, 20493180), (2, 10246590), (3, 6831060), (4, 5123295), (5, 4098636), (6, 3415530), (9, 2277020), (10, 2049318), (12, 1707765), (15, 1366212), (18, 1138510), (20, 1024659), (30, 683106), (36, 569255), (45, 455404), (60, 341553), (90, 227702), (180, 113851), (257, 79740), (443, 46260), (514, 39870), (771, 26580), (886, 23130), (1028, 19935), (1285, 15948), (1329, 15420), (1542, 13290), (1772, 11565), (2215, 9252), (2313, 8860), (2570, 7974), (2658, 7710), (3084, 6645), (3855, 5316), (3987, 5140), (4430, 4626)]