17781990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{25771}}^1$

素因数の和:25804

約数の個数: 32

約数和(自身を含む): 44534016

約数和(自身を除く): 26752026

約数列:

[1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690, 25771, 51542, 77313, 128855, 154626, 257710, 386565, 592733, 773130, 1185466, 1778199, 2963665, 3556398, 5927330, 8890995, 17781990]

約数ペア:

[(1, 17781990), (2, 8890995), (3, 5927330), (5, 3556398), (6, 2963665), (10, 1778199), (15, 1185466), (23, 773130), (30, 592733), (46, 386565), (69, 257710), (115, 154626), (138, 128855), (230, 77313), (345, 51542), (690, 25771)]