19820420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1213}}^1$

素因数の和:1284

約数の個数: 48

約数和(自身を含む): 44869440

約数和(自身を除く): 25049020

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 43, 76, 86, 95, 172, 190, 215, 380, 430, 817, 860, 1213, 1634, 2426, 3268, 4085, 4852, 6065, 8170, 12130, 16340, 23047, 24260, 46094, 52159, 92188, 104318, 115235, 208636, 230470, 260795, 460940, 521590, 991021, 1043180, 1982042, 3964084, 4955105, 9910210, 19820420]

約数ペア:

[(1, 19820420), (2, 9910210), (4, 4955105), (5, 3964084), (10, 1982042), (19, 1043180), (20, 991021), (38, 521590), (43, 460940), (76, 260795), (86, 230470), (95, 208636), (172, 115235), (190, 104318), (215, 92188), (380, 52159), (430, 46094), (817, 24260), (860, 23047), (1213, 16340), (1634, 12130), (2426, 8170), (3268, 6065), (4085, 4852)]