1640080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1$

素因数の和:128

約数の個数: 80

約数和(自身を含む): 4374720

約数和(自身を除く): 2734640

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 38, 40, 52, 65, 76, 80, 83, 95, 104, 130, 152, 166, 190, 208, 247, 260, 304, 332, 380, 415, 494, 520, 664, 760, 830, 988, 1040, 1079, 1235, 1328, 1520, 1577, 1660, 1976, 2158, 2470, 3154, 3320, 3952, 4316, 4940, 5395, 6308, 6640, 7885, 8632, 9880, 10790, 12616, 15770, 17264, 19760, 20501, 21580, 25232, 31540, 41002, 43160, 63080, 82004, 86320, 102505, 126160, 164008, 205010, 328016, 410020, 820040, 1640080]

約数ペア:

[(1, 1640080), (2, 820040), (4, 410020), (5, 328016), (8, 205010), (10, 164008), (13, 126160), (16, 102505), (19, 86320), (20, 82004), (26, 63080), (38, 43160), (40, 41002), (52, 31540), (65, 25232), (76, 21580), (80, 20501), (83, 19760), (95, 17264), (104, 15770), (130, 12616), (152, 10790), (166, 9880), (190, 8632), (208, 7885), (247, 6640), (260, 6308), (304, 5395), (332, 4940), (380, 4316), (415, 3952), (494, 3320), (520, 3154), (664, 2470), (760, 2158), (830, 1976), (988, 1660), (1040, 1577), (1079, 1520), (1235, 1328)]