21013960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{293}}^1$

素因数の和:478

約数の個数: 64

約数和(自身を含む): 52073280

約数和(自身を除く): 31059320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 163, 220, 293, 326, 440, 586, 652, 815, 1172, 1304, 1465, 1630, 1793, 2344, 2930, 3223, 3260, 3586, 5860, 6446, 6520, 7172, 8965, 11720, 12892, 14344, 16115, 17930, 25784, 32230, 35860, 47759, 64460, 71720, 95518, 128920, 191036, 238795, 382072, 477590, 525349, 955180, 1050698, 1910360, 2101396, 2626745, 4202792, 5253490, 10506980, 21013960]

約数ペア:

[(1, 21013960), (2, 10506980), (4, 5253490), (5, 4202792), (8, 2626745), (10, 2101396), (11, 1910360), (20, 1050698), (22, 955180), (40, 525349), (44, 477590), (55, 382072), (88, 238795), (110, 191036), (163, 128920), (220, 95518), (293, 71720), (326, 64460), (440, 47759), (586, 35860), (652, 32230), (815, 25784), (1172, 17930), (1304, 16115), (1465, 14344), (1630, 12892), (1793, 11720), (2344, 8965), (2930, 7172), (3223, 6520), (3260, 6446), (3586, 5860)]