638611920

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{20627}}^1$

素因数の和:20689

約数の個数: 120

約数和(自身を含む): 2194654176

約数和(自身を除く): 1556042256

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 43, 45, 48, 60, 72, 80, 86, 90, 120, 129, 144, 172, 180, 215, 240, 258, 344, 360, 387, 430, 516, 645, 688, 720, 774, 860, 1032, 1290, 1548, 1720, 1935, 2064, 2580, 3096, 3440, 3870, 5160, 6192, 7740, 10320, 15480, 20627, 30960, 41254, 61881, 82508, 103135, 123762, 165016, 185643, 206270, 247524, 309405, 330032, 371286, 412540, 495048, 618810, 742572, 825080, 886961, 928215, 990096, 1237620, 1485144, 1650160, 1773922, 1856430, 2475240, 2660883, 2970288, 3547844, 3712860, 4434805, 4950480, 5321766, 7095688, 7425720, 7982649, 8869610, 10643532, 13304415, 14191376, 14851440, 15965298, 17739220, 21287064, 26608830, 31930596, 35478440, 39913245, 42574128, 53217660, 63861192, 70956880, 79826490, 106435320, 127722384, 159652980, 212870640, 319305960, 638611920]

約数ペア:

[(1, 638611920), (2, 319305960), (3, 212870640), (4, 159652980), (5, 127722384), (6, 106435320), (8, 79826490), (9, 70956880), (10, 63861192), (12, 53217660), (15, 42574128), (16, 39913245), (18, 35478440), (20, 31930596), (24, 26608830), (30, 21287064), (36, 17739220), (40, 15965298), (43, 14851440), (45, 14191376), (48, 13304415), (60, 10643532), (72, 8869610), (80, 7982649), (86, 7425720), (90, 7095688), (120, 5321766), (129, 4950480), (144, 4434805), (172, 3712860), (180, 3547844), (215, 2970288), (240, 2660883), (258, 2475240), (344, 1856430), (360, 1773922), (387, 1650160), (430, 1485144), (516, 1237620), (645, 990096), (688, 928215), (720, 886961), (774, 825080), (860, 742572), (1032, 618810), (1290, 495048), (1548, 412540), (1720, 371286), (1935, 330032), (2064, 309405), (2580, 247524), (3096, 206270), (3440, 185643), (3870, 165016), (5160, 123762), (6192, 103135), (7740, 82508), (10320, 61881), (15480, 41254), (20627, 30960)]