20010440

素因数分解:

$2^3\times 5^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:270

約数の個数: 64

約数和(自身を含む): 46872000

約数和(自身を除く): 26861560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 59, 61, 118, 122, 139, 236, 244, 278, 295, 305, 472, 488, 556, 590, 610, 695, 1112, 1180, 1220, 1390, 2360, 2440, 2780, 3599, 5560, 7198, 8201, 8479, 14396, 16402, 16958, 17995, 28792, 32804, 33916, 35990, 41005, 42395, 65608, 67832, 71980, 82010, 84790, 143960, 164020, 169580, 328040, 339160, 500261, 1000522, 2001044, 2501305, 4002088, 5002610, 10005220, 20010440]

約数ペア:

[(1, 20010440), (2, 10005220), (4, 5002610), (5, 4002088), (8, 2501305), (10, 2001044), (20, 1000522), (40, 500261), (59, 339160), (61, 328040), (118, 169580), (122, 164020), (139, 143960), (236, 84790), (244, 82010), (278, 71980), (295, 67832), (305, 65608), (472, 42395), (488, 41005), (556, 35990), (590, 33916), (610, 32804), (695, 28792), (1112, 17995), (1180, 16958), (1220, 16402), (1390, 14396), (2360, 8479), (2440, 8201), (2780, 7198), (3599, 5560)]