20831690

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{149}}^1$

素因数の和:239

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 22713910

約数列:

[1, 2, 5, 10, 11, 22, 31, 41, 55, 62, 82, 110, 149, 155, 205, 298, 310, 341, 410, 451, 682, 745, 902, 1271, 1490, 1639, 1705, 2255, 2542, 3278, 3410, 4510, 4619, 6109, 6355, 8195, 9238, 12218, 12710, 13981, 16390, 23095, 27962, 30545, 46190, 50809, 61090, 67199, 69905, 101618, 134398, 139810, 189379, 254045, 335995, 378758, 508090, 671990, 946895, 1893790, 2083169, 4166338, 10415845, 20831690]

約数ペア:

[(1, 20831690), (2, 10415845), (5, 4166338), (10, 2083169), (11, 1893790), (22, 946895), (31, 671990), (41, 508090), (55, 378758), (62, 335995), (82, 254045), (110, 189379), (149, 139810), (155, 134398), (205, 101618), (298, 69905), (310, 67199), (341, 61090), (410, 50809), (451, 46190), (682, 30545), (745, 27962), (902, 23095), (1271, 16390), (1490, 13981), (1639, 12710), (1705, 12218), (2255, 9238), (2542, 8195), (3278, 6355), (3410, 6109), (4510, 4619)]