19881760

素因数分解:

$2^5\times 5^1\times {\mathrm{313}}^1\times {\mathrm{397}}^1$

素因数の和:725

約数の個数: 48

約数和(自身を含む): 47239416

約数和(自身を除く): 27357656

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 313, 397, 626, 794, 1252, 1565, 1588, 1985, 2504, 3130, 3176, 3970, 5008, 6260, 6352, 7940, 10016, 12520, 12704, 15880, 25040, 31760, 50080, 63520, 124261, 248522, 497044, 621305, 994088, 1242610, 1988176, 2485220, 3976352, 4970440, 9940880, 19881760]

約数ペア:

[(1, 19881760), (2, 9940880), (4, 4970440), (5, 3976352), (8, 2485220), (10, 1988176), (16, 1242610), (20, 994088), (32, 621305), (40, 497044), (80, 248522), (160, 124261), (313, 63520), (397, 50080), (626, 31760), (794, 25040), (1252, 15880), (1565, 12704), (1588, 12520), (1985, 10016), (2504, 7940), (3130, 6352), (3176, 6260), (3970, 5008)]