20865960

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{389}}^1$

素因数の和:555

約数の個数: 96

約数和(自身を含む): 68445000

約数和(自身を除く): 47579040

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 149, 180, 298, 360, 389, 447, 596, 745, 778, 894, 1167, 1192, 1341, 1490, 1556, 1788, 1945, 2235, 2334, 2682, 2980, 3112, 3501, 3576, 3890, 4470, 4668, 5364, 5835, 5960, 6705, 7002, 7780, 8940, 9336, 10728, 11670, 13410, 14004, 15560, 17505, 17880, 23340, 26820, 28008, 35010, 46680, 53640, 57961, 70020, 115922, 140040, 173883, 231844, 289805, 347766, 463688, 521649, 579610, 695532, 869415, 1043298, 1159220, 1391064, 1738830, 2086596, 2318440, 2608245, 3477660, 4173192, 5216490, 6955320, 10432980, 20865960]

約数ペア:

[(1, 20865960), (2, 10432980), (3, 6955320), (4, 5216490), (5, 4173192), (6, 3477660), (8, 2608245), (9, 2318440), (10, 2086596), (12, 1738830), (15, 1391064), (18, 1159220), (20, 1043298), (24, 869415), (30, 695532), (36, 579610), (40, 521649), (45, 463688), (60, 347766), (72, 289805), (90, 231844), (120, 173883), (149, 140040), (180, 115922), (298, 70020), (360, 57961), (389, 53640), (447, 46680), (596, 35010), (745, 28008), (778, 26820), (894, 23340), (1167, 17880), (1192, 17505), (1341, 15560), (1490, 14004), (1556, 13410), (1788, 11670), (1945, 10728), (2235, 9336), (2334, 8940), (2682, 7780), (2980, 7002), (3112, 6705), (3501, 5960), (3576, 5835), (3890, 5364), (4470, 4668)]