21386625

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1$

素因数の和:179

約数の個数: 64

約数和(自身を含む): 39626496

約数和(自身を除く): 18239871

約数列:

[1, 3, 5, 13, 15, 25, 39, 41, 65, 75, 107, 123, 125, 195, 205, 321, 325, 375, 533, 535, 615, 975, 1025, 1391, 1599, 1605, 1625, 2665, 2675, 3075, 4173, 4387, 4875, 5125, 6955, 7995, 8025, 13161, 13325, 13375, 15375, 20865, 21935, 34775, 39975, 40125, 57031, 65805, 66625, 104325, 109675, 171093, 173875, 199875, 285155, 329025, 521625, 548375, 855465, 1425775, 1645125, 4277325, 7128875, 21386625]

約数ペア:

[(1, 21386625), (3, 7128875), (5, 4277325), (13, 1645125), (15, 1425775), (25, 855465), (39, 548375), (41, 521625), (65, 329025), (75, 285155), (107, 199875), (123, 173875), (125, 171093), (195, 109675), (205, 104325), (321, 66625), (325, 65805), (375, 57031), (533, 40125), (535, 39975), (615, 34775), (975, 21935), (1025, 20865), (1391, 15375), (1599, 13375), (1605, 13325), (1625, 13161), (2665, 8025), (2675, 7995), (3075, 6955), (4173, 5125), (4387, 4875)]