20904331370

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{953}}^1\times {\mathrm{5443}}^1$

素因数の和:6447

約数の個数: 64

約数和(自身を含む): 41880996864

約数和(自身を除く): 20976665494

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 953, 1906, 2015, 4030, 4765, 5443, 9530, 10886, 12389, 24778, 27215, 29543, 54430, 59086, 61945, 70759, 123890, 141518, 147715, 168733, 295430, 337466, 353795, 384059, 707590, 768118, 843665, 1687330, 1920295, 2193529, 3840590, 4387058, 5187179, 10374358, 10967645, 21935290, 25935895, 51871790, 67433327, 134866654, 160802549, 321605098, 337166635, 674333270, 804012745, 1608025490, 2090433137, 4180866274, 10452165685, 20904331370]

約数ペア:

[(1, 20904331370), (2, 10452165685), (5, 4180866274), (10, 2090433137), (13, 1608025490), (26, 804012745), (31, 674333270), (62, 337166635), (65, 321605098), (130, 160802549), (155, 134866654), (310, 67433327), (403, 51871790), (806, 25935895), (953, 21935290), (1906, 10967645), (2015, 10374358), (4030, 5187179), (4765, 4387058), (5443, 3840590), (9530, 2193529), (10886, 1920295), (12389, 1687330), (24778, 843665), (27215, 768118), (29543, 707590), (54430, 384059), (59086, 353795), (61945, 337466), (70759, 295430), (123890, 168733), (141518, 147715)]