20818620

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1$

素因数の和:273

約数の個数: 120

約数和(自身を含む): 66594528

約数和(自身を除く): 45775908

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 71, 81, 90, 108, 135, 142, 162, 180, 181, 213, 270, 284, 324, 355, 362, 405, 426, 540, 543, 639, 710, 724, 810, 852, 905, 1065, 1086, 1278, 1420, 1620, 1629, 1810, 1917, 2130, 2172, 2556, 2715, 3195, 3258, 3620, 3834, 4260, 4887, 5430, 5751, 6390, 6516, 7668, 8145, 9585, 9774, 10860, 11502, 12780, 12851, 14661, 16290, 19170, 19548, 23004, 24435, 25702, 28755, 29322, 32580, 38340, 38553, 48870, 51404, 57510, 58644, 64255, 73305, 77106, 97740, 115020, 115659, 128510, 146610, 154212, 192765, 231318, 257020, 293220, 346977, 385530, 462636, 578295, 693954, 771060, 1040931, 1156590, 1387908, 1734885, 2081862, 2313180, 3469770, 4163724, 5204655, 6939540, 10409310, 20818620]

約数ペア:

[(1, 20818620), (2, 10409310), (3, 6939540), (4, 5204655), (5, 4163724), (6, 3469770), (9, 2313180), (10, 2081862), (12, 1734885), (15, 1387908), (18, 1156590), (20, 1040931), (27, 771060), (30, 693954), (36, 578295), (45, 462636), (54, 385530), (60, 346977), (71, 293220), (81, 257020), (90, 231318), (108, 192765), (135, 154212), (142, 146610), (162, 128510), (180, 115659), (181, 115020), (213, 97740), (270, 77106), (284, 73305), (324, 64255), (355, 58644), (362, 57510), (405, 51404), (426, 48870), (540, 38553), (543, 38340), (639, 32580), (710, 29322), (724, 28755), (810, 25702), (852, 24435), (905, 23004), (1065, 19548), (1086, 19170), (1278, 16290), (1420, 14661), (1620, 12851), (1629, 12780), (1810, 11502), (1917, 10860), (2130, 9774), (2172, 9585), (2556, 8145), (2715, 7668), (3195, 6516), (3258, 6390), (3620, 5751), (3834, 5430), (4260, 4887)]