20899318

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{401}}^1$

素因数の和:540

約数の個数: 32

約数和(自身を含む): 36122112

約数和(自身を除く): 15222794

約数列:

[1, 2, 11, 22, 23, 46, 103, 206, 253, 401, 506, 802, 1133, 2266, 2369, 4411, 4738, 8822, 9223, 18446, 26059, 41303, 52118, 82606, 101453, 202906, 454333, 908666, 949969, 1899938, 10449659, 20899318]

約数ペア:

[(1, 20899318), (2, 10449659), (11, 1899938), (22, 949969), (23, 908666), (46, 454333), (103, 202906), (206, 101453), (253, 82606), (401, 52118), (506, 41303), (802, 26059), (1133, 18446), (2266, 9223), (2369, 8822), (4411, 4738)]