21485440

素因数分解:

$2^7\times 5^1\times {\mathrm{59}}^1\times {\mathrm{569}}^1$

素因数の和:647

約数の個数: 64

約数和(自身を含む): 52326000

約数和(自身を除く): 30840560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 64, 80, 118, 128, 160, 236, 295, 320, 472, 569, 590, 640, 944, 1138, 1180, 1888, 2276, 2360, 2845, 3776, 4552, 4720, 5690, 7552, 9104, 9440, 11380, 18208, 18880, 22760, 33571, 36416, 37760, 45520, 67142, 72832, 91040, 134284, 167855, 182080, 268568, 335710, 364160, 537136, 671420, 1074272, 1342840, 2148544, 2685680, 4297088, 5371360, 10742720, 21485440]

約数ペア:

[(1, 21485440), (2, 10742720), (4, 5371360), (5, 4297088), (8, 2685680), (10, 2148544), (16, 1342840), (20, 1074272), (32, 671420), (40, 537136), (59, 364160), (64, 335710), (80, 268568), (118, 182080), (128, 167855), (160, 134284), (236, 91040), (295, 72832), (320, 67142), (472, 45520), (569, 37760), (590, 36416), (640, 33571), (944, 22760), (1138, 18880), (1180, 18208), (1888, 11380), (2276, 9440), (2360, 9104), (2845, 7552), (3776, 5690), (4552, 4720)]