28851020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{659}}^1$

素因数の和:878

約数の個数: 48

約数和(自身を含む): 66528000

約数和(自身を除く): 37676980

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 659, 796, 995, 1318, 1990, 2189, 2636, 3295, 3980, 4378, 6590, 7249, 8756, 10945, 13180, 14498, 21890, 28996, 36245, 43780, 72490, 131141, 144980, 262282, 524564, 655705, 1311410, 1442551, 2622820, 2885102, 5770204, 7212755, 14425510, 28851020]

約数ペア:

[(1, 28851020), (2, 14425510), (4, 7212755), (5, 5770204), (10, 2885102), (11, 2622820), (20, 1442551), (22, 1311410), (44, 655705), (55, 524564), (110, 262282), (199, 144980), (220, 131141), (398, 72490), (659, 43780), (796, 36245), (995, 28996), (1318, 21890), (1990, 14498), (2189, 13180), (2636, 10945), (3295, 8756), (3980, 7249), (4378, 6590)]