21765440

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{4001}}^1$

素因数の和:4035

約数の個数: 56

約数和(自身を含む): 54891432

約数和(自身を除く): 33125992

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 136, 160, 170, 272, 320, 340, 544, 680, 1088, 1360, 2720, 4001, 5440, 8002, 16004, 20005, 32008, 40010, 64016, 68017, 80020, 128032, 136034, 160040, 256064, 272068, 320080, 340085, 544136, 640160, 680170, 1088272, 1280320, 1360340, 2176544, 2720680, 4353088, 5441360, 10882720, 21765440]

約数ペア:

[(1, 21765440), (2, 10882720), (4, 5441360), (5, 4353088), (8, 2720680), (10, 2176544), (16, 1360340), (17, 1280320), (20, 1088272), (32, 680170), (34, 640160), (40, 544136), (64, 340085), (68, 320080), (80, 272068), (85, 256064), (136, 160040), (160, 136034), (170, 128032), (272, 80020), (320, 68017), (340, 64016), (544, 40010), (680, 32008), (1088, 20005), (1360, 16004), (2720, 8002), (4001, 5440)]