21105448

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{547}}^1$

素因数の和:626

約数の個数: 64

約数和(自身を含む): 49714560

約数和(自身を除く): 28609112

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 53, 56, 91, 104, 106, 182, 212, 364, 371, 424, 547, 689, 728, 742, 1094, 1378, 1484, 2188, 2756, 2968, 3829, 4376, 4823, 5512, 7111, 7658, 9646, 14222, 15316, 19292, 28444, 28991, 30632, 38584, 49777, 56888, 57982, 99554, 115964, 199108, 202937, 231928, 376883, 398216, 405874, 753766, 811748, 1507532, 1623496, 2638181, 3015064, 5276362, 10552724, 21105448]

約数ペア:

[(1, 21105448), (2, 10552724), (4, 5276362), (7, 3015064), (8, 2638181), (13, 1623496), (14, 1507532), (26, 811748), (28, 753766), (52, 405874), (53, 398216), (56, 376883), (91, 231928), (104, 202937), (106, 199108), (182, 115964), (212, 99554), (364, 57982), (371, 56888), (424, 49777), (547, 38584), (689, 30632), (728, 28991), (742, 28444), (1094, 19292), (1378, 15316), (1484, 14222), (2188, 9646), (2756, 7658), (2968, 7111), (3829, 5512), (4376, 4823)]