21709020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:307

約数の個数: 96

約数和(自身を含む): 64915200

約数和(自身を除く): 43206180

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 19, 20, 30, 38, 57, 60, 76, 95, 114, 137, 139, 190, 228, 274, 278, 285, 380, 411, 417, 548, 556, 570, 685, 695, 822, 834, 1140, 1370, 1390, 1644, 1668, 2055, 2085, 2603, 2641, 2740, 2780, 4110, 4170, 5206, 5282, 7809, 7923, 8220, 8340, 10412, 10564, 13015, 13205, 15618, 15846, 19043, 26030, 26410, 31236, 31692, 38086, 39045, 39615, 52060, 52820, 57129, 76172, 78090, 79230, 95215, 114258, 156180, 158460, 190430, 228516, 285645, 361817, 380860, 571290, 723634, 1085451, 1142580, 1447268, 1809085, 2170902, 3618170, 4341804, 5427255, 7236340, 10854510, 21709020]

約数ペア:

[(1, 21709020), (2, 10854510), (3, 7236340), (4, 5427255), (5, 4341804), (6, 3618170), (10, 2170902), (12, 1809085), (15, 1447268), (19, 1142580), (20, 1085451), (30, 723634), (38, 571290), (57, 380860), (60, 361817), (76, 285645), (95, 228516), (114, 190430), (137, 158460), (139, 156180), (190, 114258), (228, 95215), (274, 79230), (278, 78090), (285, 76172), (380, 57129), (411, 52820), (417, 52060), (548, 39615), (556, 39045), (570, 38086), (685, 31692), (695, 31236), (822, 26410), (834, 26030), (1140, 19043), (1370, 15846), (1390, 15618), (1644, 13205), (1668, 13015), (2055, 10564), (2085, 10412), (2603, 8340), (2641, 8220), (2740, 7923), (2780, 7809), (4110, 5282), (4170, 5206)]