64381840

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{167}}^1$

素因数の和:320

約数の個数: 80

約数和(自身を含む): 154990080

約数和(自身を除く): 90608240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 79, 80, 122, 158, 167, 244, 305, 316, 334, 395, 488, 610, 632, 668, 790, 835, 976, 1220, 1264, 1336, 1580, 1670, 2440, 2672, 3160, 3340, 4819, 4880, 6320, 6680, 9638, 10187, 13193, 13360, 19276, 20374, 24095, 26386, 38552, 40748, 48190, 50935, 52772, 65965, 77104, 81496, 96380, 101870, 105544, 131930, 162992, 192760, 203740, 211088, 263860, 385520, 407480, 527720, 804773, 814960, 1055440, 1609546, 3219092, 4023865, 6438184, 8047730, 12876368, 16095460, 32190920, 64381840]

約数ペア:

[(1, 64381840), (2, 32190920), (4, 16095460), (5, 12876368), (8, 8047730), (10, 6438184), (16, 4023865), (20, 3219092), (40, 1609546), (61, 1055440), (79, 814960), (80, 804773), (122, 527720), (158, 407480), (167, 385520), (244, 263860), (305, 211088), (316, 203740), (334, 192760), (395, 162992), (488, 131930), (610, 105544), (632, 101870), (668, 96380), (790, 81496), (835, 77104), (976, 65965), (1220, 52772), (1264, 50935), (1336, 48190), (1580, 40748), (1670, 38552), (2440, 26386), (2672, 24095), (3160, 20374), (3340, 19276), (4819, 13360), (4880, 13193), (6320, 10187), (6680, 9638)]