20873320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{293}}^1$

素因数の和:454

約数の個数: 64

約数和(自身を含む): 51120720

約数和(自身を除く): 30247400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 137, 260, 274, 293, 520, 548, 586, 685, 1096, 1172, 1370, 1465, 1781, 2344, 2740, 2930, 3562, 3809, 5480, 5860, 7124, 7618, 8905, 11720, 14248, 15236, 17810, 19045, 30472, 35620, 38090, 40141, 71240, 76180, 80282, 152360, 160564, 200705, 321128, 401410, 521833, 802820, 1043666, 1605640, 2087332, 2609165, 4174664, 5218330, 10436660, 20873320]

約数ペア:

[(1, 20873320), (2, 10436660), (4, 5218330), (5, 4174664), (8, 2609165), (10, 2087332), (13, 1605640), (20, 1043666), (26, 802820), (40, 521833), (52, 401410), (65, 321128), (104, 200705), (130, 160564), (137, 152360), (260, 80282), (274, 76180), (293, 71240), (520, 40141), (548, 38090), (586, 35620), (685, 30472), (1096, 19045), (1172, 17810), (1370, 15236), (1465, 14248), (1781, 11720), (2344, 8905), (2740, 7618), (2930, 7124), (3562, 5860), (3809, 5480)]