19659440

素因数分解:

$2^4\times 5^1\times {\mathrm{397}}^1\times {\mathrm{619}}^1$

素因数の和:1029

約数の個数: 40

約数和(自身を含む): 45897360

約数和(自身を除く): 26237920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 397, 619, 794, 1238, 1588, 1985, 2476, 3095, 3176, 3970, 4952, 6190, 6352, 7940, 9904, 12380, 15880, 24760, 31760, 49520, 245743, 491486, 982972, 1228715, 1965944, 2457430, 3931888, 4914860, 9829720, 19659440]

約数ペア:

[(1, 19659440), (2, 9829720), (4, 4914860), (5, 3931888), (8, 2457430), (10, 1965944), (16, 1228715), (20, 982972), (40, 491486), (80, 245743), (397, 49520), (619, 31760), (794, 24760), (1238, 15880), (1588, 12380), (1985, 9904), (2476, 7940), (3095, 6352), (3176, 6190), (3970, 4952)]