21193220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{751}}^1$

素因数の和:860

約数の個数: 48

約数和(自身を含む): 47755008

約数和(自身を除く): 26561788

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 83, 85, 166, 170, 332, 340, 415, 751, 830, 1411, 1502, 1660, 2822, 3004, 3755, 5644, 7055, 7510, 12767, 14110, 15020, 25534, 28220, 51068, 62333, 63835, 124666, 127670, 249332, 255340, 311665, 623330, 1059661, 1246660, 2119322, 4238644, 5298305, 10596610, 21193220]

約数ペア:

[(1, 21193220), (2, 10596610), (4, 5298305), (5, 4238644), (10, 2119322), (17, 1246660), (20, 1059661), (34, 623330), (68, 311665), (83, 255340), (85, 249332), (166, 127670), (170, 124666), (332, 63835), (340, 62333), (415, 51068), (751, 28220), (830, 25534), (1411, 15020), (1502, 14110), (1660, 12767), (2822, 7510), (3004, 7055), (3755, 5644)]