20902440

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13399}}^1$

素因数の和:13426

約数の個数: 64

約数和(自身を含む): 67536000

約数和(自身を除く): 46633560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13399, 26798, 40197, 53596, 66995, 80394, 107192, 133990, 160788, 174187, 200985, 267980, 321576, 348374, 401970, 522561, 535960, 696748, 803940, 870935, 1045122, 1393496, 1607880, 1741870, 2090244, 2612805, 3483740, 4180488, 5225610, 6967480, 10451220, 20902440]

約数ペア:

[(1, 20902440), (2, 10451220), (3, 6967480), (4, 5225610), (5, 4180488), (6, 3483740), (8, 2612805), (10, 2090244), (12, 1741870), (13, 1607880), (15, 1393496), (20, 1045122), (24, 870935), (26, 803940), (30, 696748), (39, 535960), (40, 522561), (52, 401970), (60, 348374), (65, 321576), (78, 267980), (104, 200985), (120, 174187), (130, 160788), (156, 133990), (195, 107192), (260, 80394), (312, 66995), (390, 53596), (520, 40197), (780, 26798), (1560, 13399)]