28005660

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{991}}^1$

素因数の和:1163

約数の個数: 72

約数和(自身を含む): 85577856

約数和(自身を除く): 57572196

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 157, 180, 314, 471, 628, 785, 942, 991, 1413, 1570, 1884, 1982, 2355, 2826, 2973, 3140, 3964, 4710, 4955, 5652, 5946, 7065, 8919, 9420, 9910, 11892, 14130, 14865, 17838, 19820, 28260, 29730, 35676, 44595, 59460, 89190, 155587, 178380, 311174, 466761, 622348, 777935, 933522, 1400283, 1555870, 1867044, 2333805, 2800566, 3111740, 4667610, 5601132, 7001415, 9335220, 14002830, 28005660]

約数ペア:

[(1, 28005660), (2, 14002830), (3, 9335220), (4, 7001415), (5, 5601132), (6, 4667610), (9, 3111740), (10, 2800566), (12, 2333805), (15, 1867044), (18, 1555870), (20, 1400283), (30, 933522), (36, 777935), (45, 622348), (60, 466761), (90, 311174), (157, 178380), (180, 155587), (314, 89190), (471, 59460), (628, 44595), (785, 35676), (942, 29730), (991, 28260), (1413, 19820), (1570, 17838), (1884, 14865), (1982, 14130), (2355, 11892), (2826, 9910), (2973, 9420), (3140, 8919), (3964, 7065), (4710, 5946), (4955, 5652)]