19994615440

素因数分解:

$2^4\times 5^1\times {\mathrm{103}}^1\times {\mathrm{661}}^1\times {\mathrm{3671}}^1$

素因数の和:4448

約数の個数: 80

約数和(自身を含む): 47022633216

約数和(自身を除く): 27028017776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 103, 206, 412, 515, 661, 824, 1030, 1322, 1648, 2060, 2644, 3305, 3671, 4120, 5288, 6610, 7342, 8240, 10576, 13220, 14684, 18355, 26440, 29368, 36710, 52880, 58736, 68083, 73420, 136166, 146840, 272332, 293680, 340415, 378113, 544664, 680830, 756226, 1089328, 1361660, 1512452, 1890565, 2426531, 2723320, 3024904, 3781130, 4853062, 5446640, 6049808, 7562260, 9706124, 12132655, 15124520, 19412248, 24265310, 30249040, 38824496, 48530620, 97061240, 194122480, 249932693, 499865386, 999730772, 1249663465, 1999461544, 2499326930, 3998923088, 4998653860, 9997307720, 19994615440]

約数ペア:

[(1, 19994615440), (2, 9997307720), (4, 4998653860), (5, 3998923088), (8, 2499326930), (10, 1999461544), (16, 1249663465), (20, 999730772), (40, 499865386), (80, 249932693), (103, 194122480), (206, 97061240), (412, 48530620), (515, 38824496), (661, 30249040), (824, 24265310), (1030, 19412248), (1322, 15124520), (1648, 12132655), (2060, 9706124), (2644, 7562260), (3305, 6049808), (3671, 5446640), (4120, 4853062), (5288, 3781130), (6610, 3024904), (7342, 2723320), (8240, 2426531), (10576, 1890565), (13220, 1512452), (14684, 1361660), (18355, 1089328), (26440, 756226), (29368, 680830), (36710, 544664), (52880, 378113), (58736, 340415), (68083, 293680), (73420, 272332), (136166, 146840)]