21036040

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{311}}^1$

素因数の和:430

約数の個数: 64

約数和(自身を含む): 50544000

約数和(自身を除く): 29507960

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 89, 95, 152, 178, 190, 311, 356, 380, 445, 622, 712, 760, 890, 1244, 1555, 1691, 1780, 2488, 3110, 3382, 3560, 5909, 6220, 6764, 8455, 11818, 12440, 13528, 16910, 23636, 27679, 29545, 33820, 47272, 55358, 59090, 67640, 110716, 118180, 138395, 221432, 236360, 276790, 525901, 553580, 1051802, 1107160, 2103604, 2629505, 4207208, 5259010, 10518020, 21036040]

約数ペア:

[(1, 21036040), (2, 10518020), (4, 5259010), (5, 4207208), (8, 2629505), (10, 2103604), (19, 1107160), (20, 1051802), (38, 553580), (40, 525901), (76, 276790), (89, 236360), (95, 221432), (152, 138395), (178, 118180), (190, 110716), (311, 67640), (356, 59090), (380, 55358), (445, 47272), (622, 33820), (712, 29545), (760, 27679), (890, 23636), (1244, 16910), (1555, 13528), (1691, 12440), (1780, 11818), (2488, 8455), (3110, 6764), (3382, 6220), (3560, 5909)]