20494875

素因数分解:

$3^1\times 5^3\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:133

約数の個数: 64

約数和(自身を含む): 36900864

約数和(自身を除く): 16405989

約数列:

[1, 3, 5, 15, 25, 31, 41, 43, 75, 93, 123, 125, 129, 155, 205, 215, 375, 465, 615, 645, 775, 1025, 1075, 1271, 1333, 1763, 2325, 3075, 3225, 3813, 3875, 3999, 5125, 5289, 5375, 6355, 6665, 8815, 11625, 15375, 16125, 19065, 19995, 26445, 31775, 33325, 44075, 54653, 95325, 99975, 132225, 158875, 163959, 166625, 220375, 273265, 476625, 499875, 661125, 819795, 1366325, 4098975, 6831625, 20494875]

約数ペア:

[(1, 20494875), (3, 6831625), (5, 4098975), (15, 1366325), (25, 819795), (31, 661125), (41, 499875), (43, 476625), (75, 273265), (93, 220375), (123, 166625), (125, 163959), (129, 158875), (155, 132225), (205, 99975), (215, 95325), (375, 54653), (465, 44075), (615, 33325), (645, 31775), (775, 26445), (1025, 19995), (1075, 19065), (1271, 16125), (1333, 15375), (1763, 11625), (2325, 8815), (3075, 6665), (3225, 6355), (3813, 5375), (3875, 5289), (3999, 5125)]