21101590

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{139}}^1$

素因数の和:229

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 22444010

約数列:

[1, 2, 5, 10, 17, 19, 34, 38, 47, 85, 94, 95, 139, 170, 190, 235, 278, 323, 470, 646, 695, 799, 893, 1390, 1598, 1615, 1786, 2363, 2641, 3230, 3995, 4465, 4726, 5282, 6533, 7990, 8930, 11815, 13066, 13205, 15181, 23630, 26410, 30362, 32665, 44897, 65330, 75905, 89794, 111061, 124127, 151810, 222122, 224485, 248254, 448970, 555305, 620635, 1110610, 1241270, 2110159, 4220318, 10550795, 21101590]

約数ペア:

[(1, 21101590), (2, 10550795), (5, 4220318), (10, 2110159), (17, 1241270), (19, 1110610), (34, 620635), (38, 555305), (47, 448970), (85, 248254), (94, 224485), (95, 222122), (139, 151810), (170, 124127), (190, 111061), (235, 89794), (278, 75905), (323, 65330), (470, 44897), (646, 32665), (695, 30362), (799, 26410), (893, 23630), (1390, 15181), (1598, 13205), (1615, 13066), (1786, 11815), (2363, 8930), (2641, 7990), (3230, 6533), (3995, 5282), (4465, 4726)]