820040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1$

素因数の和:126

約数の個数: 64

約数和(自身を含む): 2116800

約数和(自身を除く): 1296760

約数列:

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

約数ペア:

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