19971540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{613}}^1$

素因数の和:809

約数の個数: 72

約数和(自身を含む): 61014408

約数和(自身を除く): 41042868

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 181, 362, 543, 613, 724, 905, 1086, 1226, 1629, 1810, 1839, 2172, 2452, 2715, 3065, 3258, 3620, 3678, 5430, 5517, 6130, 6516, 7356, 8145, 9195, 10860, 11034, 12260, 16290, 18390, 22068, 27585, 32580, 36780, 55170, 110340, 110953, 221906, 332859, 443812, 554765, 665718, 998577, 1109530, 1331436, 1664295, 1997154, 2219060, 3328590, 3994308, 4992885, 6657180, 9985770, 19971540]

約数ペア:

[(1, 19971540), (2, 9985770), (3, 6657180), (4, 4992885), (5, 3994308), (6, 3328590), (9, 2219060), (10, 1997154), (12, 1664295), (15, 1331436), (18, 1109530), (20, 998577), (30, 665718), (36, 554765), (45, 443812), (60, 332859), (90, 221906), (180, 110953), (181, 110340), (362, 55170), (543, 36780), (613, 32580), (724, 27585), (905, 22068), (1086, 18390), (1226, 16290), (1629, 12260), (1810, 11034), (1839, 10860), (2172, 9195), (2452, 8145), (2715, 7356), (3065, 6516), (3258, 6130), (3620, 5517), (3678, 5430)]