21553130

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{397}}^1$

素因数の和:554

約数の個数: 32

約数和(自身を含む): 39975120

約数和(自身を除く): 18421990

約数列:

[1, 2, 5, 10, 61, 89, 122, 178, 305, 397, 445, 610, 794, 890, 1985, 3970, 5429, 10858, 24217, 27145, 35333, 48434, 54290, 70666, 121085, 176665, 242170, 353330, 2155313, 4310626, 10776565, 21553130]

約数ペア:

[(1, 21553130), (2, 10776565), (5, 4310626), (10, 2155313), (61, 353330), (89, 242170), (122, 176665), (178, 121085), (305, 70666), (397, 54290), (445, 48434), (610, 35333), (794, 27145), (890, 24217), (1985, 10858), (3970, 5429)]