21125325

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{461}}^1$

素因数の和:534

約数の個数: 48

約数和(自身を含む): 38497536

約数和(自身を除く): 17372211

約数列:

[1, 3, 5, 13, 15, 25, 39, 47, 65, 75, 141, 195, 235, 325, 461, 611, 705, 975, 1175, 1383, 1833, 2305, 3055, 3525, 5993, 6915, 9165, 11525, 15275, 17979, 21667, 29965, 34575, 45825, 65001, 89895, 108335, 149825, 281671, 325005, 449475, 541675, 845013, 1408355, 1625025, 4225065, 7041775, 21125325]

約数ペア:

[(1, 21125325), (3, 7041775), (5, 4225065), (13, 1625025), (15, 1408355), (25, 845013), (39, 541675), (47, 449475), (65, 325005), (75, 281671), (141, 149825), (195, 108335), (235, 89895), (325, 65001), (461, 45825), (611, 34575), (705, 29965), (975, 21667), (1175, 17979), (1383, 15275), (1833, 11525), (2305, 9165), (3055, 6915), (3525, 5993)]