399420

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{317}}^1$

素因数の和:339

約数の個数: 72

約数和(自身を含む): 1389024

約数和(自身を除く): 989604

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 317, 420, 630, 634, 951, 1260, 1268, 1585, 1902, 2219, 2853, 3170, 3804, 4438, 4755, 5706, 6340, 6657, 8876, 9510, 11095, 11412, 13314, 14265, 19020, 19971, 22190, 26628, 28530, 33285, 39942, 44380, 57060, 66570, 79884, 99855, 133140, 199710, 399420]

約数ペア:

[(1, 399420), (2, 199710), (3, 133140), (4, 99855), (5, 79884), (6, 66570), (7, 57060), (9, 44380), (10, 39942), (12, 33285), (14, 28530), (15, 26628), (18, 22190), (20, 19971), (21, 19020), (28, 14265), (30, 13314), (35, 11412), (36, 11095), (42, 9510), (45, 8876), (60, 6657), (63, 6340), (70, 5706), (84, 4755), (90, 4438), (105, 3804), (126, 3170), (140, 2853), (180, 2219), (210, 1902), (252, 1585), (315, 1268), (317, 1260), (420, 951), (630, 634)]