81478960

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{331}}^1$

素因数の和:542

約数の個数: 80

約数和(自身を含む): 202299552

約数和(自身を除く): 120820592

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 181, 272, 331, 340, 362, 662, 680, 724, 905, 1324, 1360, 1448, 1655, 1810, 2648, 2896, 3077, 3310, 3620, 5296, 5627, 6154, 6620, 7240, 11254, 12308, 13240, 14480, 15385, 22508, 24616, 26480, 28135, 30770, 45016, 49232, 56270, 59911, 61540, 90032, 112540, 119822, 123080, 225080, 239644, 246160, 299555, 450160, 479288, 599110, 958576, 1018487, 1198220, 2036974, 2396440, 4073948, 4792880, 5092435, 8147896, 10184870, 16295792, 20369740, 40739480, 81478960]

約数ペア:

[(1, 81478960), (2, 40739480), (4, 20369740), (5, 16295792), (8, 10184870), (10, 8147896), (16, 5092435), (17, 4792880), (20, 4073948), (34, 2396440), (40, 2036974), (68, 1198220), (80, 1018487), (85, 958576), (136, 599110), (170, 479288), (181, 450160), (272, 299555), (331, 246160), (340, 239644), (362, 225080), (662, 123080), (680, 119822), (724, 112540), (905, 90032), (1324, 61540), (1360, 59911), (1448, 56270), (1655, 49232), (1810, 45016), (2648, 30770), (2896, 28135), (3077, 26480), (3310, 24616), (3620, 22508), (5296, 15385), (5627, 14480), (6154, 13240), (6620, 12308), (7240, 11254)]