21999910

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{1301}}^1$

素因数の和:1416

約数の個数: 32

約数和(自身を含む): 42184800

約数和(自身を除く): 20184890

約数列:

[1, 2, 5, 10, 19, 38, 89, 95, 178, 190, 445, 890, 1301, 1691, 2602, 3382, 6505, 8455, 13010, 16910, 24719, 49438, 115789, 123595, 231578, 247190, 578945, 1157890, 2199991, 4399982, 10999955, 21999910]

約数ペア:

[(1, 21999910), (2, 10999955), (5, 4399982), (10, 2199991), (19, 1157890), (38, 578945), (89, 247190), (95, 231578), (178, 123595), (190, 115789), (445, 49438), (890, 24719), (1301, 16910), (1691, 13010), (2602, 8455), (3382, 6505)]