20397416

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 44452800

約数和(自身を除く): 24055384

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 68, 83, 104, 136, 139, 166, 221, 278, 332, 442, 556, 664, 884, 1079, 1112, 1411, 1768, 1807, 2158, 2363, 2822, 3614, 4316, 4726, 5644, 7228, 8632, 9452, 11288, 11537, 14456, 18343, 18904, 23074, 30719, 36686, 46148, 61438, 73372, 92296, 122876, 146744, 149981, 196129, 245752, 299962, 392258, 599924, 784516, 1199848, 1569032, 2549677, 5099354, 10198708, 20397416]

約数ペア:

[(1, 20397416), (2, 10198708), (4, 5099354), (8, 2549677), (13, 1569032), (17, 1199848), (26, 784516), (34, 599924), (52, 392258), (68, 299962), (83, 245752), (104, 196129), (136, 149981), (139, 146744), (166, 122876), (221, 92296), (278, 73372), (332, 61438), (442, 46148), (556, 36686), (664, 30719), (884, 23074), (1079, 18904), (1112, 18343), (1411, 14456), (1768, 11537), (1807, 11288), (2158, 9452), (2363, 8632), (2822, 7228), (3614, 5644), (4316, 4726)]