21188960

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{167}}^1$

素因数の和:256

約数の個数: 96

約数和(自身を含む): 55121472

約数和(自身を除く): 33932512

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 61, 65, 80, 104, 122, 130, 160, 167, 208, 244, 260, 305, 334, 416, 488, 520, 610, 668, 793, 835, 976, 1040, 1220, 1336, 1586, 1670, 1952, 2080, 2171, 2440, 2672, 3172, 3340, 3965, 4342, 4880, 5344, 6344, 6680, 7930, 8684, 9760, 10187, 10855, 12688, 13360, 15860, 17368, 20374, 21710, 25376, 26720, 31720, 34736, 40748, 43420, 50935, 63440, 69472, 81496, 86840, 101870, 126880, 132431, 162992, 173680, 203740, 264862, 325984, 347360, 407480, 529724, 662155, 814960, 1059448, 1324310, 1629920, 2118896, 2648620, 4237792, 5297240, 10594480, 21188960]

約数ペア:

[(1, 21188960), (2, 10594480), (4, 5297240), (5, 4237792), (8, 2648620), (10, 2118896), (13, 1629920), (16, 1324310), (20, 1059448), (26, 814960), (32, 662155), (40, 529724), (52, 407480), (61, 347360), (65, 325984), (80, 264862), (104, 203740), (122, 173680), (130, 162992), (160, 132431), (167, 126880), (208, 101870), (244, 86840), (260, 81496), (305, 69472), (334, 63440), (416, 50935), (488, 43420), (520, 40748), (610, 34736), (668, 31720), (793, 26720), (835, 25376), (976, 21710), (1040, 20374), (1220, 17368), (1336, 15860), (1586, 13360), (1670, 12688), (1952, 10855), (2080, 10187), (2171, 9760), (2440, 8684), (2672, 7930), (3172, 6680), (3340, 6344), (3965, 5344), (4342, 4880)]