20487825

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{107}}^1$

素因数の和:183

約数の個数: 72

約数和(自身を含む): 39693888

約数和(自身を除く): 19206063

約数列:

[1, 3, 5, 9, 15, 23, 25, 37, 45, 69, 75, 107, 111, 115, 185, 207, 225, 321, 333, 345, 535, 555, 575, 851, 925, 963, 1035, 1605, 1665, 1725, 2461, 2553, 2675, 2775, 3959, 4255, 4815, 5175, 7383, 7659, 8025, 8325, 11877, 12305, 12765, 19795, 21275, 22149, 24075, 35631, 36915, 38295, 59385, 61525, 63825, 91057, 98975, 110745, 178155, 184575, 191475, 273171, 296925, 455285, 553725, 819513, 890775, 1365855, 2276425, 4097565, 6829275, 20487825]

約数ペア:

[(1, 20487825), (3, 6829275), (5, 4097565), (9, 2276425), (15, 1365855), (23, 890775), (25, 819513), (37, 553725), (45, 455285), (69, 296925), (75, 273171), (107, 191475), (111, 184575), (115, 178155), (185, 110745), (207, 98975), (225, 91057), (321, 63825), (333, 61525), (345, 59385), (535, 38295), (555, 36915), (575, 35631), (851, 24075), (925, 22149), (963, 21275), (1035, 19795), (1605, 12765), (1665, 12305), (1725, 11877), (2461, 8325), (2553, 8025), (2675, 7659), (2775, 7383), (3959, 5175), (4255, 4815)]