404745980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{61}}^1\times {\mathrm{919}}^1$

素因数の和:1027

約数の個数: 72

約数和(自身を含む): 912754080

約数和(自身を除く): 508008100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 61, 76, 95, 122, 190, 244, 305, 361, 380, 610, 722, 919, 1159, 1220, 1444, 1805, 1838, 2318, 3610, 3676, 4595, 4636, 5795, 7220, 9190, 11590, 17461, 18380, 22021, 23180, 34922, 44042, 56059, 69844, 87305, 88084, 110105, 112118, 174610, 220210, 224236, 280295, 331759, 349220, 440420, 560590, 663518, 1065121, 1121180, 1327036, 1658795, 2130242, 3317590, 4260484, 5325605, 6635180, 10651210, 20237299, 21302420, 40474598, 80949196, 101186495, 202372990, 404745980]

約数ペア:

[(1, 404745980), (2, 202372990), (4, 101186495), (5, 80949196), (10, 40474598), (19, 21302420), (20, 20237299), (38, 10651210), (61, 6635180), (76, 5325605), (95, 4260484), (122, 3317590), (190, 2130242), (244, 1658795), (305, 1327036), (361, 1121180), (380, 1065121), (610, 663518), (722, 560590), (919, 440420), (1159, 349220), (1220, 331759), (1444, 280295), (1805, 224236), (1838, 220210), (2318, 174610), (3610, 112118), (3676, 110105), (4595, 88084), (4636, 87305), (5795, 69844), (7220, 56059), (9190, 44042), (11590, 34922), (17461, 23180), (18380, 22021)]