20909120

素因数分解:

$2^6\times 5^1\times {\mathrm{19}}^2\times {\mathrm{181}}^1$

素因数の和:236

約数の個数: 84

約数和(自身を含む): 52838604

約数和(自身を除く): 31929484

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 152, 160, 181, 190, 304, 320, 361, 362, 380, 608, 722, 724, 760, 905, 1216, 1444, 1448, 1520, 1805, 1810, 2888, 2896, 3040, 3439, 3610, 3620, 5776, 5792, 6080, 6878, 7220, 7240, 11552, 11584, 13756, 14440, 14480, 17195, 23104, 27512, 28880, 28960, 34390, 55024, 57760, 57920, 65341, 68780, 110048, 115520, 130682, 137560, 220096, 261364, 275120, 326705, 522728, 550240, 653410, 1045456, 1100480, 1306820, 2090912, 2613640, 4181824, 5227280, 10454560, 20909120]

約数ペア:

[(1, 20909120), (2, 10454560), (4, 5227280), (5, 4181824), (8, 2613640), (10, 2090912), (16, 1306820), (19, 1100480), (20, 1045456), (32, 653410), (38, 550240), (40, 522728), (64, 326705), (76, 275120), (80, 261364), (95, 220096), (152, 137560), (160, 130682), (181, 115520), (190, 110048), (304, 68780), (320, 65341), (361, 57920), (362, 57760), (380, 55024), (608, 34390), (722, 28960), (724, 28880), (760, 27512), (905, 23104), (1216, 17195), (1444, 14480), (1448, 14440), (1520, 13756), (1805, 11584), (1810, 11552), (2888, 7240), (2896, 7220), (3040, 6878), (3439, 6080), (3610, 5792), (3620, 5776)]