21405240

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{1607}}^1$

素因数の和:1661

約数の個数: 96

約数和(自身を含む): 71491680

約数和(自身を除く): 50086440

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 37, 40, 45, 60, 72, 74, 90, 111, 120, 148, 180, 185, 222, 296, 333, 360, 370, 444, 555, 666, 740, 888, 1110, 1332, 1480, 1607, 1665, 2220, 2664, 3214, 3330, 4440, 4821, 6428, 6660, 8035, 9642, 12856, 13320, 14463, 16070, 19284, 24105, 28926, 32140, 38568, 48210, 57852, 59459, 64280, 72315, 96420, 115704, 118918, 144630, 178377, 192840, 237836, 289260, 297295, 356754, 475672, 535131, 578520, 594590, 713508, 891885, 1070262, 1189180, 1427016, 1783770, 2140524, 2378360, 2675655, 3567540, 4281048, 5351310, 7135080, 10702620, 21405240]

約数ペア:

[(1, 21405240), (2, 10702620), (3, 7135080), (4, 5351310), (5, 4281048), (6, 3567540), (8, 2675655), (9, 2378360), (10, 2140524), (12, 1783770), (15, 1427016), (18, 1189180), (20, 1070262), (24, 891885), (30, 713508), (36, 594590), (37, 578520), (40, 535131), (45, 475672), (60, 356754), (72, 297295), (74, 289260), (90, 237836), (111, 192840), (120, 178377), (148, 144630), (180, 118918), (185, 115704), (222, 96420), (296, 72315), (333, 64280), (360, 59459), (370, 57852), (444, 48210), (555, 38568), (666, 32140), (740, 28926), (888, 24105), (1110, 19284), (1332, 16070), (1480, 14463), (1607, 13320), (1665, 12856), (2220, 9642), (2664, 8035), (3214, 6660), (3330, 6428), (4440, 4821)]