19838440

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{5113}}^1$

素因数の和:5221

約数の個数: 32

約数和(自身を含む): 45105480

約数和(自身を除く): 25267040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 5113, 10226, 20452, 25565, 40904, 51130, 102260, 204520, 495961, 991922, 1983844, 2479805, 3967688, 4959610, 9919220, 19838440]

約数ペア:

[(1, 19838440), (2, 9919220), (4, 4959610), (5, 3967688), (8, 2479805), (10, 1983844), (20, 991922), (40, 495961), (97, 204520), (194, 102260), (388, 51130), (485, 40904), (776, 25565), (970, 20452), (1940, 10226), (3880, 5113)]