20571720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13187}}^1$

素因数の和:13214

約数の個数: 64

約数和(自身を含む): 66467520

約数和(自身を除く): 45895800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13187, 26374, 39561, 52748, 65935, 79122, 105496, 131870, 158244, 171431, 197805, 263740, 316488, 342862, 395610, 514293, 527480, 685724, 791220, 857155, 1028586, 1371448, 1582440, 1714310, 2057172, 2571465, 3428620, 4114344, 5142930, 6857240, 10285860, 20571720]

約数ペア:

[(1, 20571720), (2, 10285860), (3, 6857240), (4, 5142930), (5, 4114344), (6, 3428620), (8, 2571465), (10, 2057172), (12, 1714310), (13, 1582440), (15, 1371448), (20, 1028586), (24, 857155), (26, 791220), (30, 685724), (39, 527480), (40, 514293), (52, 395610), (60, 342862), (65, 316488), (78, 263740), (104, 197805), (120, 171431), (130, 158244), (156, 131870), (195, 105496), (260, 79122), (312, 65935), (390, 52748), (520, 39561), (780, 26374), (1560, 13187)]