20178405

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2029}}^1$

素因数の和:2070

約数の個数: 48

約数和(自身を含む): 39901680

約数和(自身を除く): 19723275

約数列:

[1, 3, 5, 9, 13, 15, 17, 39, 45, 51, 65, 85, 117, 153, 195, 221, 255, 585, 663, 765, 1105, 1989, 2029, 3315, 6087, 9945, 10145, 18261, 26377, 30435, 34493, 79131, 91305, 103479, 131885, 172465, 237393, 310437, 395655, 448409, 517395, 1186965, 1345227, 1552185, 2242045, 4035681, 6726135, 20178405]

約数ペア:

[(1, 20178405), (3, 6726135), (5, 4035681), (9, 2242045), (13, 1552185), (15, 1345227), (17, 1186965), (39, 517395), (45, 448409), (51, 395655), (65, 310437), (85, 237393), (117, 172465), (153, 131885), (195, 103479), (221, 91305), (255, 79131), (585, 34493), (663, 30435), (765, 26377), (1105, 18261), (1989, 10145), (2029, 9945), (3315, 6087)]