20837648

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:192

約数の個数: 80

約数和(自身を含む): 47246976

約数和(自身を除く): 26409328

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 34, 52, 68, 71, 83, 104, 136, 142, 166, 208, 221, 272, 284, 332, 442, 568, 664, 884, 923, 1079, 1136, 1207, 1328, 1411, 1768, 1846, 2158, 2414, 2822, 3536, 3692, 4316, 4828, 5644, 5893, 7384, 8632, 9656, 11288, 11786, 14768, 15691, 17264, 18343, 19312, 22576, 23572, 31382, 36686, 47144, 62764, 73372, 76609, 94288, 100181, 125528, 146744, 153218, 200362, 251056, 293488, 306436, 400724, 612872, 801448, 1225744, 1302353, 1602896, 2604706, 5209412, 10418824, 20837648]

約数ペア:

[(1, 20837648), (2, 10418824), (4, 5209412), (8, 2604706), (13, 1602896), (16, 1302353), (17, 1225744), (26, 801448), (34, 612872), (52, 400724), (68, 306436), (71, 293488), (83, 251056), (104, 200362), (136, 153218), (142, 146744), (166, 125528), (208, 100181), (221, 94288), (272, 76609), (284, 73372), (332, 62764), (442, 47144), (568, 36686), (664, 31382), (884, 23572), (923, 22576), (1079, 19312), (1136, 18343), (1207, 17264), (1328, 15691), (1411, 14768), (1768, 11786), (1846, 11288), (2158, 9656), (2414, 8632), (2822, 7384), (3536, 5893), (3692, 5644), (4316, 4828)]