19981760

素因数分解:

$2^6\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1523}}^1$

素因数の和:1581

約数の個数: 56

約数和(自身を含む): 48774096

約数和(自身を除く): 28792336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 160, 164, 205, 320, 328, 410, 656, 820, 1312, 1523, 1640, 2624, 3046, 3280, 6092, 6560, 7615, 12184, 13120, 15230, 24368, 30460, 48736, 60920, 62443, 97472, 121840, 124886, 243680, 249772, 312215, 487360, 499544, 624430, 999088, 1248860, 1998176, 2497720, 3996352, 4995440, 9990880, 19981760]

約数ペア:

[(1, 19981760), (2, 9990880), (4, 4995440), (5, 3996352), (8, 2497720), (10, 1998176), (16, 1248860), (20, 999088), (32, 624430), (40, 499544), (41, 487360), (64, 312215), (80, 249772), (82, 243680), (160, 124886), (164, 121840), (205, 97472), (320, 62443), (328, 60920), (410, 48736), (656, 30460), (820, 24368), (1312, 15230), (1523, 13120), (1640, 12184), (2624, 7615), (3046, 6560), (3280, 6092)]