21551060

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{509}}^1$

素因数の和:620

約数の個数: 48

約数和(自身を含む): 47552400

約数和(自身を除く): 26001340

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 73, 116, 145, 146, 290, 292, 365, 509, 580, 730, 1018, 1460, 2036, 2117, 2545, 4234, 5090, 8468, 10180, 10585, 14761, 21170, 29522, 37157, 42340, 59044, 73805, 74314, 147610, 148628, 185785, 295220, 371570, 743140, 1077553, 2155106, 4310212, 5387765, 10775530, 21551060]

約数ペア:

[(1, 21551060), (2, 10775530), (4, 5387765), (5, 4310212), (10, 2155106), (20, 1077553), (29, 743140), (58, 371570), (73, 295220), (116, 185785), (145, 148628), (146, 147610), (290, 74314), (292, 73805), (365, 59044), (509, 42340), (580, 37157), (730, 29522), (1018, 21170), (1460, 14761), (2036, 10585), (2117, 10180), (2545, 8468), (4234, 5090)]