21028212

素因数分解:

$2^2\times 3^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{433}}^1$

素因数の和:533

約数の個数: 72

約数和(自身を含む): 56871360

約数和(自身を除く): 35843148

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 19, 36, 38, 57, 71, 76, 114, 142, 171, 213, 228, 284, 342, 426, 433, 639, 684, 852, 866, 1278, 1299, 1349, 1732, 2556, 2598, 2698, 3897, 4047, 5196, 5396, 7794, 8094, 8227, 12141, 15588, 16188, 16454, 24282, 24681, 30743, 32908, 48564, 49362, 61486, 74043, 92229, 98724, 122972, 148086, 184458, 276687, 296172, 368916, 553374, 584117, 1106748, 1168234, 1752351, 2336468, 3504702, 5257053, 7009404, 10514106, 21028212]

約数ペア:

[(1, 21028212), (2, 10514106), (3, 7009404), (4, 5257053), (6, 3504702), (9, 2336468), (12, 1752351), (18, 1168234), (19, 1106748), (36, 584117), (38, 553374), (57, 368916), (71, 296172), (76, 276687), (114, 184458), (142, 148086), (171, 122972), (213, 98724), (228, 92229), (284, 74043), (342, 61486), (426, 49362), (433, 48564), (639, 32908), (684, 30743), (852, 24681), (866, 24282), (1278, 16454), (1299, 16188), (1349, 15588), (1732, 12141), (2556, 8227), (2598, 8094), (2698, 7794), (3897, 5396), (4047, 5196)]