25639760

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{7817}}^1$

素因数の和:7871

約数の個数: 40

約数和(自身を含む): 61074216

約数和(自身を除く): 35434456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 7817, 15634, 31268, 39085, 62536, 78170, 125072, 156340, 312680, 320497, 625360, 640994, 1281988, 1602485, 2563976, 3204970, 5127952, 6409940, 12819880, 25639760]

約数ペア:

[(1, 25639760), (2, 12819880), (4, 6409940), (5, 5127952), (8, 3204970), (10, 2563976), (16, 1602485), (20, 1281988), (40, 640994), (41, 625360), (80, 320497), (82, 312680), (164, 156340), (205, 125072), (328, 78170), (410, 62536), (656, 39085), (820, 31268), (1640, 15634), (3280, 7817)]