21489240

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{1367}}^1$

素因数の和:1512

約数の個数: 64

約数和(自身を含む): 65007360

約数和(自身を除く): 43518120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 131, 262, 393, 524, 655, 786, 1048, 1310, 1367, 1572, 1965, 2620, 2734, 3144, 3930, 4101, 5240, 5468, 6835, 7860, 8202, 10936, 13670, 15720, 16404, 20505, 27340, 32808, 41010, 54680, 82020, 164040, 179077, 358154, 537231, 716308, 895385, 1074462, 1432616, 1790770, 2148924, 2686155, 3581540, 4297848, 5372310, 7163080, 10744620, 21489240]

約数ペア:

[(1, 21489240), (2, 10744620), (3, 7163080), (4, 5372310), (5, 4297848), (6, 3581540), (8, 2686155), (10, 2148924), (12, 1790770), (15, 1432616), (20, 1074462), (24, 895385), (30, 716308), (40, 537231), (60, 358154), (120, 179077), (131, 164040), (262, 82020), (393, 54680), (524, 41010), (655, 32808), (786, 27340), (1048, 20505), (1310, 16404), (1367, 15720), (1572, 13670), (1965, 10936), (2620, 8202), (2734, 7860), (3144, 6835), (3930, 5468), (4101, 5240)]