19916505

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{2749}}^1$

素因数の和:2790

約数の個数: 48

約数和(自身を含む): 41184000

約数和(自身を除く): 21267495

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 35, 45, 63, 69, 105, 115, 161, 207, 315, 345, 483, 805, 1035, 1449, 2415, 2749, 7245, 8247, 13745, 19243, 24741, 41235, 57729, 63227, 96215, 123705, 173187, 189681, 288645, 316135, 442589, 569043, 865935, 948405, 1327767, 2212945, 2845215, 3983301, 6638835, 19916505]

約数ペア:

[(1, 19916505), (3, 6638835), (5, 3983301), (7, 2845215), (9, 2212945), (15, 1327767), (21, 948405), (23, 865935), (35, 569043), (45, 442589), (63, 316135), (69, 288645), (105, 189681), (115, 173187), (161, 123705), (207, 96215), (315, 63227), (345, 57729), (483, 41235), (805, 24741), (1035, 19243), (1449, 13745), (2415, 8247), (2749, 7245)]