21012810

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{179}}^1$

素因数の和:252

約数の個数: 128

約数和(自身を含む): 63866880

約数和(自身を除く): 42854070

約数列:

[1, 2, 3, 5, 6, 7, 10, 13, 14, 15, 21, 26, 30, 35, 39, 42, 43, 65, 70, 78, 86, 91, 105, 129, 130, 179, 182, 195, 210, 215, 258, 273, 301, 358, 390, 430, 455, 537, 546, 559, 602, 645, 895, 903, 910, 1074, 1118, 1253, 1290, 1365, 1505, 1677, 1790, 1806, 2327, 2506, 2685, 2730, 2795, 3010, 3354, 3759, 3913, 4515, 4654, 5370, 5590, 6265, 6981, 7518, 7697, 7826, 8385, 9030, 11635, 11739, 12530, 13962, 15394, 16289, 16770, 18795, 19565, 23091, 23270, 23478, 32578, 34905, 37590, 38485, 39130, 46182, 48867, 53879, 58695, 69810, 76970, 81445, 97734, 100061, 107758, 115455, 117390, 161637, 162890, 200122, 230910, 244335, 269395, 300183, 323274, 488670, 500305, 538790, 600366, 700427, 808185, 1000610, 1400854, 1500915, 1616370, 2101281, 3001830, 3502135, 4202562, 7004270, 10506405, 21012810]

約数ペア:

[(1, 21012810), (2, 10506405), (3, 7004270), (5, 4202562), (6, 3502135), (7, 3001830), (10, 2101281), (13, 1616370), (14, 1500915), (15, 1400854), (21, 1000610), (26, 808185), (30, 700427), (35, 600366), (39, 538790), (42, 500305), (43, 488670), (65, 323274), (70, 300183), (78, 269395), (86, 244335), (91, 230910), (105, 200122), (129, 162890), (130, 161637), (179, 117390), (182, 115455), (195, 107758), (210, 100061), (215, 97734), (258, 81445), (273, 76970), (301, 69810), (358, 58695), (390, 53879), (430, 48867), (455, 46182), (537, 39130), (546, 38485), (559, 37590), (602, 34905), (645, 32578), (895, 23478), (903, 23270), (910, 23091), (1074, 19565), (1118, 18795), (1253, 16770), (1290, 16289), (1365, 15394), (1505, 13962), (1677, 12530), (1790, 11739), (1806, 11635), (2327, 9030), (2506, 8385), (2685, 7826), (2730, 7697), (2795, 7518), (3010, 6981), (3354, 6265), (3759, 5590), (3913, 5370), (4515, 4654)]