209885620

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{2711}}^1$

素因数の和:2813

約数の個数: 72

約数和(自身を含む): 519402240

約数和(自身を除く): 309516620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 79, 98, 140, 158, 196, 245, 316, 395, 490, 553, 790, 980, 1106, 1580, 2212, 2711, 2765, 3871, 5422, 5530, 7742, 10844, 11060, 13555, 15484, 18977, 19355, 27110, 37954, 38710, 54220, 75908, 77420, 94885, 132839, 189770, 214169, 265678, 379540, 428338, 531356, 664195, 856676, 1070845, 1328390, 1499183, 2141690, 2656780, 2998366, 4283380, 5996732, 7495915, 10494281, 14991830, 20988562, 29983660, 41977124, 52471405, 104942810, 209885620]

約数ペア:

[(1, 209885620), (2, 104942810), (4, 52471405), (5, 41977124), (7, 29983660), (10, 20988562), (14, 14991830), (20, 10494281), (28, 7495915), (35, 5996732), (49, 4283380), (70, 2998366), (79, 2656780), (98, 2141690), (140, 1499183), (158, 1328390), (196, 1070845), (245, 856676), (316, 664195), (395, 531356), (490, 428338), (553, 379540), (790, 265678), (980, 214169), (1106, 189770), (1580, 132839), (2212, 94885), (2711, 77420), (2765, 75908), (3871, 54220), (5422, 38710), (5530, 37954), (7742, 27110), (10844, 19355), (11060, 18977), (13555, 15484)]