81724020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{194581}}^1$

素因数の和:194600

約数の個数: 48

約数和(自身を含む): 261518208

約数和(自身を除く): 179794188

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 194581, 389162, 583743, 778324, 972905, 1167486, 1362067, 1945810, 2334972, 2724134, 2918715, 3891620, 4086201, 5448268, 5837430, 6810335, 8172402, 11674860, 13620670, 16344804, 20431005, 27241340, 40862010, 81724020]

約数ペア:

[(1, 81724020), (2, 40862010), (3, 27241340), (4, 20431005), (5, 16344804), (6, 13620670), (7, 11674860), (10, 8172402), (12, 6810335), (14, 5837430), (15, 5448268), (20, 4086201), (21, 3891620), (28, 2918715), (30, 2724134), (35, 2334972), (42, 1945810), (60, 1362067), (70, 1167486), (84, 972905), (105, 778324), (140, 583743), (210, 389162), (420, 194581)]