21687520

素因数分解:

$2^5\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1523}}^1$

素因数の和:1627

約数の個数: 48

約数和(自身を含む): 51846480

約数和(自身を除く): 30158960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 89, 160, 178, 356, 445, 712, 890, 1424, 1523, 1780, 2848, 3046, 3560, 6092, 7120, 7615, 12184, 14240, 15230, 24368, 30460, 48736, 60920, 121840, 135547, 243680, 271094, 542188, 677735, 1084376, 1355470, 2168752, 2710940, 4337504, 5421880, 10843760, 21687520]

約数ペア:

[(1, 21687520), (2, 10843760), (4, 5421880), (5, 4337504), (8, 2710940), (10, 2168752), (16, 1355470), (20, 1084376), (32, 677735), (40, 542188), (80, 271094), (89, 243680), (160, 135547), (178, 121840), (356, 60920), (445, 48736), (712, 30460), (890, 24368), (1424, 15230), (1523, 14240), (1780, 12184), (2848, 7615), (3046, 7120), (3560, 6092)]