21397840

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{7229}}^1$

素因数の和:7279

約数の個数: 40

約数和(自身を含む): 51101640

約数和(自身を除く): 29703800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 148, 185, 296, 370, 592, 740, 1480, 2960, 7229, 14458, 28916, 36145, 57832, 72290, 115664, 144580, 267473, 289160, 534946, 578320, 1069892, 1337365, 2139784, 2674730, 4279568, 5349460, 10698920, 21397840]

約数ペア:

[(1, 21397840), (2, 10698920), (4, 5349460), (5, 4279568), (8, 2674730), (10, 2139784), (16, 1337365), (20, 1069892), (37, 578320), (40, 534946), (74, 289160), (80, 267473), (148, 144580), (185, 115664), (296, 72290), (370, 57832), (592, 36145), (740, 28916), (1480, 14458), (2960, 7229)]