20781810

素因数分解:

$2^1\times 3^2\times 5^1\times 7^1\times {\mathrm{32987}}^1$

素因数の和:33007

約数の個数: 48

約数和(自身を含む): 61753536

約数和(自身を除く): 40971726

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 30, 35, 42, 45, 63, 70, 90, 105, 126, 210, 315, 630, 32987, 65974, 98961, 164935, 197922, 230909, 296883, 329870, 461818, 494805, 593766, 692727, 989610, 1154545, 1385454, 1484415, 2078181, 2309090, 2968830, 3463635, 4156362, 6927270, 10390905, 20781810]

約数ペア:

[(1, 20781810), (2, 10390905), (3, 6927270), (5, 4156362), (6, 3463635), (7, 2968830), (9, 2309090), (10, 2078181), (14, 1484415), (15, 1385454), (18, 1154545), (21, 989610), (30, 692727), (35, 593766), (42, 494805), (45, 461818), (63, 329870), (70, 296883), (90, 230909), (105, 197922), (126, 164935), (210, 98961), (315, 65974), (630, 32987)]