21515650

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{419}}^1$

素因数の和:523

約数の個数: 48

約数和(自身を含む): 43747200

約数和(自身を除く): 22231550

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 79, 130, 158, 325, 395, 419, 650, 790, 838, 1027, 1975, 2054, 2095, 3950, 4190, 5135, 5447, 10270, 10475, 10894, 20950, 25675, 27235, 33101, 51350, 54470, 66202, 136175, 165505, 272350, 331010, 430313, 827525, 860626, 1655050, 2151565, 4303130, 10757825, 21515650]

約数ペア:

[(1, 21515650), (2, 10757825), (5, 4303130), (10, 2151565), (13, 1655050), (25, 860626), (26, 827525), (50, 430313), (65, 331010), (79, 272350), (130, 165505), (158, 136175), (325, 66202), (395, 54470), (419, 51350), (650, 33101), (790, 27235), (838, 25675), (1027, 20950), (1975, 10894), (2054, 10475), (2095, 10270), (3950, 5447), (4190, 5135)]