20522620

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{419}}^1$

素因数の和:538

約数の個数: 48

約数和(自身を含む): 45158400

約数和(自身を除く): 24635780

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 79, 124, 155, 158, 310, 316, 395, 419, 620, 790, 838, 1580, 1676, 2095, 2449, 4190, 4898, 8380, 9796, 12245, 12989, 24490, 25978, 33101, 48980, 51956, 64945, 66202, 129890, 132404, 165505, 259780, 331010, 662020, 1026131, 2052262, 4104524, 5130655, 10261310, 20522620]

約数ペア:

[(1, 20522620), (2, 10261310), (4, 5130655), (5, 4104524), (10, 2052262), (20, 1026131), (31, 662020), (62, 331010), (79, 259780), (124, 165505), (155, 132404), (158, 129890), (310, 66202), (316, 64945), (395, 51956), (419, 48980), (620, 33101), (790, 25978), (838, 24490), (1580, 12989), (1676, 12245), (2095, 9796), (2449, 8380), (4190, 4898)]