21031768

素因数分解:

$2^3\times {\mathrm{89}}^1\times {\mathrm{109}}^1\times {\mathrm{271}}^1$

素因数の和:475

約数の個数: 32

約数和(自身を含む): 40392000

約数和(自身を除く): 19360232

約数列:

[1, 2, 4, 8, 89, 109, 178, 218, 271, 356, 436, 542, 712, 872, 1084, 2168, 9701, 19402, 24119, 29539, 38804, 48238, 59078, 77608, 96476, 118156, 192952, 236312, 2628971, 5257942, 10515884, 21031768]

約数ペア:

[(1, 21031768), (2, 10515884), (4, 5257942), (8, 2628971), (89, 236312), (109, 192952), (178, 118156), (218, 96476), (271, 77608), (356, 59078), (436, 48238), (542, 38804), (712, 29539), (872, 24119), (1084, 19402), (2168, 9701)]