21804328

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{491}}^1$

素因数の和:578

約数の個数: 64

約数和(自身を含む): 51246720

約数和(自身を除く): 29442392

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 61, 91, 104, 122, 182, 244, 364, 427, 488, 491, 728, 793, 854, 982, 1586, 1708, 1964, 3172, 3416, 3437, 3928, 5551, 6344, 6383, 6874, 11102, 12766, 13748, 22204, 25532, 27496, 29951, 44408, 44681, 51064, 59902, 89362, 119804, 178724, 209657, 239608, 357448, 389363, 419314, 778726, 838628, 1557452, 1677256, 2725541, 3114904, 5451082, 10902164, 21804328]

約数ペア:

[(1, 21804328), (2, 10902164), (4, 5451082), (7, 3114904), (8, 2725541), (13, 1677256), (14, 1557452), (26, 838628), (28, 778726), (52, 419314), (56, 389363), (61, 357448), (91, 239608), (104, 209657), (122, 178724), (182, 119804), (244, 89362), (364, 59902), (427, 51064), (488, 44681), (491, 44408), (728, 29951), (793, 27496), (854, 25532), (982, 22204), (1586, 13748), (1708, 12766), (1964, 11102), (3172, 6874), (3416, 6383), (3437, 6344), (3928, 5551)]