28103920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{443}}^1$

素因数の和:530

約数の個数: 80

約数和(自身を含む): 71682912

約数和(自身を除く): 43578992

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 61, 65, 80, 104, 122, 130, 208, 244, 260, 305, 443, 488, 520, 610, 793, 886, 976, 1040, 1220, 1586, 1772, 2215, 2440, 3172, 3544, 3965, 4430, 4880, 5759, 6344, 7088, 7930, 8860, 11518, 12688, 15860, 17720, 23036, 27023, 28795, 31720, 35440, 46072, 54046, 57590, 63440, 92144, 108092, 115180, 135115, 216184, 230360, 270230, 351299, 432368, 460720, 540460, 702598, 1080920, 1405196, 1756495, 2161840, 2810392, 3512990, 5620784, 7025980, 14051960, 28103920]

約数ペア:

[(1, 28103920), (2, 14051960), (4, 7025980), (5, 5620784), (8, 3512990), (10, 2810392), (13, 2161840), (16, 1756495), (20, 1405196), (26, 1080920), (40, 702598), (52, 540460), (61, 460720), (65, 432368), (80, 351299), (104, 270230), (122, 230360), (130, 216184), (208, 135115), (244, 115180), (260, 108092), (305, 92144), (443, 63440), (488, 57590), (520, 54046), (610, 46072), (793, 35440), (886, 31720), (976, 28795), (1040, 27023), (1220, 23036), (1586, 17720), (1772, 15860), (2215, 12688), (2440, 11518), (3172, 8860), (3544, 7930), (3965, 7088), (4430, 6344), (4880, 5759)]