21565460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4969}}^1$

素因数の和:5016

約数の個数: 48

約数和(自身を含む): 53437440

約数和(自身を除く): 31871980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 4969, 9938, 19876, 24845, 34783, 49690, 69566, 99380, 139132, 154039, 173915, 308078, 347830, 616156, 695660, 770195, 1078273, 1540390, 2156546, 3080780, 4313092, 5391365, 10782730, 21565460]

約数ペア:

[(1, 21565460), (2, 10782730), (4, 5391365), (5, 4313092), (7, 3080780), (10, 2156546), (14, 1540390), (20, 1078273), (28, 770195), (31, 695660), (35, 616156), (62, 347830), (70, 308078), (124, 173915), (140, 154039), (155, 139132), (217, 99380), (310, 69566), (434, 49690), (620, 34783), (868, 24845), (1085, 19876), (2170, 9938), (4340, 4969)]