21108720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{281}}^1\times {\mathrm{313}}^1$

素因数の和:610

約数の個数: 80

約数和(自身を含む): 65879712

約数和(自身を除く): 44770992

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 281, 313, 562, 626, 843, 939, 1124, 1252, 1405, 1565, 1686, 1878, 2248, 2504, 2810, 3130, 3372, 3756, 4215, 4496, 4695, 5008, 5620, 6260, 6744, 7512, 8430, 9390, 11240, 12520, 13488, 15024, 16860, 18780, 22480, 25040, 33720, 37560, 67440, 75120, 87953, 175906, 263859, 351812, 439765, 527718, 703624, 879530, 1055436, 1319295, 1407248, 1759060, 2110872, 2638590, 3518120, 4221744, 5277180, 7036240, 10554360, 21108720]

約数ペア:

[(1, 21108720), (2, 10554360), (3, 7036240), (4, 5277180), (5, 4221744), (6, 3518120), (8, 2638590), (10, 2110872), (12, 1759060), (15, 1407248), (16, 1319295), (20, 1055436), (24, 879530), (30, 703624), (40, 527718), (48, 439765), (60, 351812), (80, 263859), (120, 175906), (240, 87953), (281, 75120), (313, 67440), (562, 37560), (626, 33720), (843, 25040), (939, 22480), (1124, 18780), (1252, 16860), (1405, 15024), (1565, 13488), (1686, 12520), (1878, 11240), (2248, 9390), (2504, 8430), (2810, 7512), (3130, 6744), (3372, 6260), (3756, 5620), (4215, 5008), (4496, 4695)]