81984980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{383}}^1$

素因数の和:549

約数の個数: 96

約数和(自身を含む): 216760320

約数和(自身を除く): 134775340

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 139, 140, 154, 220, 278, 308, 383, 385, 556, 695, 766, 770, 973, 1390, 1529, 1532, 1540, 1915, 1946, 2681, 2780, 3058, 3830, 3892, 4213, 4865, 5362, 6116, 7645, 7660, 8426, 9730, 10703, 10724, 13405, 15290, 16852, 19460, 21065, 21406, 26810, 29491, 30580, 42130, 42812, 53237, 53515, 53620, 58982, 84260, 106474, 107030, 117964, 147455, 212948, 214060, 266185, 294910, 372659, 532370, 585607, 589820, 745318, 1064740, 1171214, 1490636, 1863295, 2342428, 2928035, 3726590, 4099249, 5856070, 7453180, 8198498, 11712140, 16396996, 20496245, 40992490, 81984980]

約数ペア:

[(1, 81984980), (2, 40992490), (4, 20496245), (5, 16396996), (7, 11712140), (10, 8198498), (11, 7453180), (14, 5856070), (20, 4099249), (22, 3726590), (28, 2928035), (35, 2342428), (44, 1863295), (55, 1490636), (70, 1171214), (77, 1064740), (110, 745318), (139, 589820), (140, 585607), (154, 532370), (220, 372659), (278, 294910), (308, 266185), (383, 214060), (385, 212948), (556, 147455), (695, 117964), (766, 107030), (770, 106474), (973, 84260), (1390, 58982), (1529, 53620), (1532, 53515), (1540, 53237), (1915, 42812), (1946, 42130), (2681, 30580), (2780, 29491), (3058, 26810), (3830, 21406), (3892, 21065), (4213, 19460), (4865, 16852), (5362, 15290), (6116, 13405), (7645, 10724), (7660, 10703), (8426, 9730)]