20690020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1$

素因数の和:221

約数の個数: 96

約数和(自身を含む): 51480576

約数和(自身を除く): 30790556

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 31, 34, 52, 62, 65, 68, 85, 124, 130, 151, 155, 170, 221, 260, 302, 310, 340, 403, 442, 527, 604, 620, 755, 806, 884, 1054, 1105, 1510, 1612, 1963, 2015, 2108, 2210, 2567, 2635, 3020, 3926, 4030, 4420, 4681, 5134, 5270, 6851, 7852, 8060, 9362, 9815, 10268, 10540, 12835, 13702, 18724, 19630, 23405, 25670, 27404, 33371, 34255, 39260, 46810, 51340, 60853, 66742, 68510, 79577, 93620, 121706, 133484, 137020, 159154, 166855, 243412, 304265, 318308, 333710, 397885, 608530, 667420, 795770, 1034501, 1217060, 1591540, 2069002, 4138004, 5172505, 10345010, 20690020]

約数ペア:

[(1, 20690020), (2, 10345010), (4, 5172505), (5, 4138004), (10, 2069002), (13, 1591540), (17, 1217060), (20, 1034501), (26, 795770), (31, 667420), (34, 608530), (52, 397885), (62, 333710), (65, 318308), (68, 304265), (85, 243412), (124, 166855), (130, 159154), (151, 137020), (155, 133484), (170, 121706), (221, 93620), (260, 79577), (302, 68510), (310, 66742), (340, 60853), (403, 51340), (442, 46810), (527, 39260), (604, 34255), (620, 33371), (755, 27404), (806, 25670), (884, 23405), (1054, 19630), (1105, 18724), (1510, 13702), (1612, 12835), (1963, 10540), (2015, 10268), (2108, 9815), (2210, 9362), (2567, 8060), (2635, 7852), (3020, 6851), (3926, 5270), (4030, 5134), (4420, 4681)]