21206280

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:235

約数の個数: 128

約数和(自身を含む): 68428800

約数和(自身を除く): 47222520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 38, 40, 57, 60, 71, 76, 95, 114, 120, 131, 142, 152, 190, 213, 228, 262, 284, 285, 355, 380, 393, 426, 456, 524, 568, 570, 655, 710, 760, 786, 852, 1048, 1065, 1140, 1310, 1349, 1420, 1572, 1704, 1965, 2130, 2280, 2489, 2620, 2698, 2840, 3144, 3930, 4047, 4260, 4978, 5240, 5396, 6745, 7467, 7860, 8094, 8520, 9301, 9956, 10792, 12445, 13490, 14934, 15720, 16188, 18602, 19912, 20235, 24890, 26980, 27903, 29868, 32376, 37204, 37335, 40470, 46505, 49780, 53960, 55806, 59736, 74408, 74670, 80940, 93010, 99560, 111612, 139515, 149340, 161880, 176719, 186020, 223224, 279030, 298680, 353438, 372040, 530157, 558060, 706876, 883595, 1060314, 1116120, 1413752, 1767190, 2120628, 2650785, 3534380, 4241256, 5301570, 7068760, 10603140, 21206280]

約数ペア:

[(1, 21206280), (2, 10603140), (3, 7068760), (4, 5301570), (5, 4241256), (6, 3534380), (8, 2650785), (10, 2120628), (12, 1767190), (15, 1413752), (19, 1116120), (20, 1060314), (24, 883595), (30, 706876), (38, 558060), (40, 530157), (57, 372040), (60, 353438), (71, 298680), (76, 279030), (95, 223224), (114, 186020), (120, 176719), (131, 161880), (142, 149340), (152, 139515), (190, 111612), (213, 99560), (228, 93010), (262, 80940), (284, 74670), (285, 74408), (355, 59736), (380, 55806), (393, 53960), (426, 49780), (456, 46505), (524, 40470), (568, 37335), (570, 37204), (655, 32376), (710, 29868), (760, 27903), (786, 26980), (852, 24890), (1048, 20235), (1065, 19912), (1140, 18602), (1310, 16188), (1349, 15720), (1420, 14934), (1572, 13490), (1704, 12445), (1965, 10792), (2130, 9956), (2280, 9301), (2489, 8520), (2620, 8094), (2698, 7860), (2840, 7467), (3144, 6745), (3930, 5396), (4047, 5240), (4260, 4978)]