20514620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^2\times {\mathrm{277}}^1$

素因数の和:339

約数の個数: 72

約数和(自身を含む): 51654624

約数和(自身を除く): 31140004

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 277, 322, 460, 529, 554, 644, 805, 1058, 1108, 1385, 1610, 1939, 2116, 2645, 2770, 3220, 3703, 3878, 5290, 5540, 6371, 7406, 7756, 9695, 10580, 12742, 14812, 18515, 19390, 25484, 31855, 37030, 38780, 44597, 63710, 74060, 89194, 127420, 146533, 178388, 222985, 293066, 445970, 586132, 732665, 891940, 1025731, 1465330, 2051462, 2930660, 4102924, 5128655, 10257310, 20514620]

約数ペア:

[(1, 20514620), (2, 10257310), (4, 5128655), (5, 4102924), (7, 2930660), (10, 2051462), (14, 1465330), (20, 1025731), (23, 891940), (28, 732665), (35, 586132), (46, 445970), (70, 293066), (92, 222985), (115, 178388), (140, 146533), (161, 127420), (230, 89194), (277, 74060), (322, 63710), (460, 44597), (529, 38780), (554, 37030), (644, 31855), (805, 25484), (1058, 19390), (1108, 18515), (1385, 14812), (1610, 12742), (1939, 10580), (2116, 9695), (2645, 7756), (2770, 7406), (3220, 6371), (3703, 5540), (3878, 5290)]