398839400

素因数分解:

$2^3\times 5^2\times {\mathrm{79}}^1\times {\mathrm{25243}}^1$

素因数の和:25338

約数の個数: 48

約数和(自身を含む): 939076800

約数和(自身を除く): 540237400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 79, 100, 158, 200, 316, 395, 632, 790, 1580, 1975, 3160, 3950, 7900, 15800, 25243, 50486, 100972, 126215, 201944, 252430, 504860, 631075, 1009720, 1262150, 1994197, 2524300, 3988394, 5048600, 7976788, 9970985, 15953576, 19941970, 39883940, 49854925, 79767880, 99709850, 199419700, 398839400]

約数ペア:

[(1, 398839400), (2, 199419700), (4, 99709850), (5, 79767880), (8, 49854925), (10, 39883940), (20, 19941970), (25, 15953576), (40, 9970985), (50, 7976788), (79, 5048600), (100, 3988394), (158, 2524300), (200, 1994197), (316, 1262150), (395, 1009720), (632, 631075), (790, 504860), (1580, 252430), (1975, 201944), (3160, 126215), (3950, 100972), (7900, 50486), (15800, 25243)]