20390820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19991}}^1$

素因数の和:20020

約数の個数: 48

約数和(自身を含む): 60455808

約数和(自身を除く): 40064988

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020, 19991, 39982, 59973, 79964, 99955, 119946, 199910, 239892, 299865, 339847, 399820, 599730, 679694, 1019541, 1199460, 1359388, 1699235, 2039082, 3398470, 4078164, 5097705, 6796940, 10195410, 20390820]

約数ペア:

[(1, 20390820), (2, 10195410), (3, 6796940), (4, 5097705), (5, 4078164), (6, 3398470), (10, 2039082), (12, 1699235), (15, 1359388), (17, 1199460), (20, 1019541), (30, 679694), (34, 599730), (51, 399820), (60, 339847), (68, 299865), (85, 239892), (102, 199910), (170, 119946), (204, 99955), (255, 79964), (340, 59973), (510, 39982), (1020, 19991)]