15321980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{661}}^1$

素因数の和:750

約数の個数: 48

約数和(自身を含む): 34476960

約数和(自身を除く): 19154980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 61, 76, 95, 122, 190, 244, 305, 380, 610, 661, 1159, 1220, 1322, 2318, 2644, 3305, 4636, 5795, 6610, 11590, 12559, 13220, 23180, 25118, 40321, 50236, 62795, 80642, 125590, 161284, 201605, 251180, 403210, 766099, 806420, 1532198, 3064396, 3830495, 7660990, 15321980]

約数ペア:

[(1, 15321980), (2, 7660990), (4, 3830495), (5, 3064396), (10, 1532198), (19, 806420), (20, 766099), (38, 403210), (61, 251180), (76, 201605), (95, 161284), (122, 125590), (190, 80642), (244, 62795), (305, 50236), (380, 40321), (610, 25118), (661, 23180), (1159, 13220), (1220, 12559), (1322, 11590), (2318, 6610), (2644, 5795), (3305, 4636)]