21724647

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{149}}^1$

素因数の和:343

約数の個数: 32

約数和(自身を含む): 34214400

約数和(自身を除く): 12489753

約数列:

[1, 3, 7, 21, 53, 131, 149, 159, 371, 393, 447, 917, 1043, 1113, 2751, 3129, 6943, 7897, 19519, 20829, 23691, 48601, 55279, 58557, 136633, 145803, 165837, 409899, 1034507, 3103521, 7241549, 21724647]

約数ペア:

[(1, 21724647), (3, 7241549), (7, 3103521), (21, 1034507), (53, 409899), (131, 165837), (149, 145803), (159, 136633), (371, 58557), (393, 55279), (447, 48601), (917, 23691), (1043, 20829), (1113, 19519), (2751, 7897), (3129, 6943)]