21784860

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{3271}}^1$

素因数の和:3323

約数の個数: 72

約数和(自身を含む): 67887456

約数和(自身を除く): 46102596

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 37, 45, 60, 74, 90, 111, 148, 180, 185, 222, 333, 370, 444, 555, 666, 740, 1110, 1332, 1665, 2220, 3271, 3330, 6542, 6660, 9813, 13084, 16355, 19626, 29439, 32710, 39252, 49065, 58878, 65420, 98130, 117756, 121027, 147195, 196260, 242054, 294390, 363081, 484108, 588780, 605135, 726162, 1089243, 1210270, 1452324, 1815405, 2178486, 2420540, 3630810, 4356972, 5446215, 7261620, 10892430, 21784860]

約数ペア:

[(1, 21784860), (2, 10892430), (3, 7261620), (4, 5446215), (5, 4356972), (6, 3630810), (9, 2420540), (10, 2178486), (12, 1815405), (15, 1452324), (18, 1210270), (20, 1089243), (30, 726162), (36, 605135), (37, 588780), (45, 484108), (60, 363081), (74, 294390), (90, 242054), (111, 196260), (148, 147195), (180, 121027), (185, 117756), (222, 98130), (333, 65420), (370, 58878), (444, 49065), (555, 39252), (666, 32710), (740, 29439), (1110, 19626), (1332, 16355), (1665, 13084), (2220, 9813), (3271, 6660), (3330, 6542)]