19581880

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{131}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 46046880

約数和(自身を除く): 26465000

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 101, 131, 148, 185, 202, 262, 296, 370, 404, 505, 524, 655, 740, 808, 1010, 1048, 1310, 1480, 2020, 2620, 3737, 4040, 4847, 5240, 7474, 9694, 13231, 14948, 18685, 19388, 24235, 26462, 29896, 37370, 38776, 48470, 52924, 66155, 74740, 96940, 105848, 132310, 149480, 193880, 264620, 489547, 529240, 979094, 1958188, 2447735, 3916376, 4895470, 9790940, 19581880]

約数ペア:

[(1, 19581880), (2, 9790940), (4, 4895470), (5, 3916376), (8, 2447735), (10, 1958188), (20, 979094), (37, 529240), (40, 489547), (74, 264620), (101, 193880), (131, 149480), (148, 132310), (185, 105848), (202, 96940), (262, 74740), (296, 66155), (370, 52924), (404, 48470), (505, 38776), (524, 37370), (655, 29896), (740, 26462), (808, 24235), (1010, 19388), (1048, 18685), (1310, 14948), (1480, 13231), (2020, 9694), (2620, 7474), (3737, 5240), (4040, 4847)]