648403725

素因数分解:

$3^1\times 5^2\times {\mathrm{37}}^1\times {\mathrm{41}}^2\times {\mathrm{139}}^1$

素因数の和:271

約数の個数: 72

約数和(自身を含む): 1136628640

約数和(自身を除く): 488224915

約数列:

[1, 3, 5, 15, 25, 37, 41, 75, 111, 123, 139, 185, 205, 417, 555, 615, 695, 925, 1025, 1517, 1681, 2085, 2775, 3075, 3475, 4551, 5043, 5143, 5699, 7585, 8405, 10425, 15429, 17097, 22755, 25215, 25715, 28495, 37925, 42025, 62197, 77145, 85485, 113775, 126075, 128575, 142475, 186591, 210863, 233659, 310985, 385725, 427425, 632589, 700977, 932955, 1054315, 1168295, 1554925, 3162945, 3504885, 4664775, 5271575, 5841475, 8645383, 15814725, 17524425, 25936149, 43226915, 129680745, 216134575, 648403725]

約数ペア:

[(1, 648403725), (3, 216134575), (5, 129680745), (15, 43226915), (25, 25936149), (37, 17524425), (41, 15814725), (75, 8645383), (111, 5841475), (123, 5271575), (139, 4664775), (185, 3504885), (205, 3162945), (417, 1554925), (555, 1168295), (615, 1054315), (695, 932955), (925, 700977), (1025, 632589), (1517, 427425), (1681, 385725), (2085, 310985), (2775, 233659), (3075, 210863), (3475, 186591), (4551, 142475), (5043, 128575), (5143, 126075), (5699, 113775), (7585, 85485), (8405, 77145), (10425, 62197), (15429, 42025), (17097, 37925), (22755, 28495), (25215, 25715)]