20967128

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{347}}^1$

素因数の和:456

約数の個数: 64

約数和(自身を含む): 49109760

約数和(自身を除く): 28142632

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 83, 91, 104, 166, 182, 332, 347, 364, 581, 664, 694, 728, 1079, 1162, 1388, 2158, 2324, 2429, 2776, 4316, 4511, 4648, 4858, 7553, 8632, 9022, 9716, 15106, 18044, 19432, 28801, 30212, 31577, 36088, 57602, 60424, 63154, 115204, 126308, 201607, 230408, 252616, 374413, 403214, 748826, 806428, 1497652, 1612856, 2620891, 2995304, 5241782, 10483564, 20967128]

約数ペア:

[(1, 20967128), (2, 10483564), (4, 5241782), (7, 2995304), (8, 2620891), (13, 1612856), (14, 1497652), (26, 806428), (28, 748826), (52, 403214), (56, 374413), (83, 252616), (91, 230408), (104, 201607), (166, 126308), (182, 115204), (332, 63154), (347, 60424), (364, 57602), (581, 36088), (664, 31577), (694, 30212), (728, 28801), (1079, 19432), (1162, 18044), (1388, 15106), (2158, 9716), (2324, 9022), (2429, 8632), (2776, 7553), (4316, 4858), (4511, 4648)]