21090120

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{181}}^1\times {\mathrm{971}}^1$

素因数の和:1166

約数の個数: 64

約数和(自身を含む): 63685440

約数和(自身を除く): 42595320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 181, 362, 543, 724, 905, 971, 1086, 1448, 1810, 1942, 2172, 2715, 2913, 3620, 3884, 4344, 4855, 5430, 5826, 7240, 7768, 9710, 10860, 11652, 14565, 19420, 21720, 23304, 29130, 38840, 58260, 116520, 175751, 351502, 527253, 703004, 878755, 1054506, 1406008, 1757510, 2109012, 2636265, 3515020, 4218024, 5272530, 7030040, 10545060, 21090120]

約数ペア:

[(1, 21090120), (2, 10545060), (3, 7030040), (4, 5272530), (5, 4218024), (6, 3515020), (8, 2636265), (10, 2109012), (12, 1757510), (15, 1406008), (20, 1054506), (24, 878755), (30, 703004), (40, 527253), (60, 351502), (120, 175751), (181, 116520), (362, 58260), (543, 38840), (724, 29130), (905, 23304), (971, 21720), (1086, 19420), (1448, 14565), (1810, 11652), (1942, 10860), (2172, 9710), (2715, 7768), (2913, 7240), (3620, 5826), (3884, 5430), (4344, 4855)]