25686920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{461}}^1$

素因数の和:678

約数の個数: 64

約数和(自身を含む): 66528000

約数和(自身を除く): 40841080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 199, 280, 398, 461, 796, 922, 995, 1393, 1592, 1844, 1990, 2305, 2786, 3227, 3688, 3980, 4610, 5572, 6454, 6965, 7960, 9220, 11144, 12908, 13930, 16135, 18440, 25816, 27860, 32270, 55720, 64540, 91739, 129080, 183478, 366956, 458695, 642173, 733912, 917390, 1284346, 1834780, 2568692, 3210865, 3669560, 5137384, 6421730, 12843460, 25686920]

約数ペア:

[(1, 25686920), (2, 12843460), (4, 6421730), (5, 5137384), (7, 3669560), (8, 3210865), (10, 2568692), (14, 1834780), (20, 1284346), (28, 917390), (35, 733912), (40, 642173), (56, 458695), (70, 366956), (140, 183478), (199, 129080), (280, 91739), (398, 64540), (461, 55720), (796, 32270), (922, 27860), (995, 25816), (1393, 18440), (1592, 16135), (1844, 13930), (1990, 12908), (2305, 11144), (2786, 9220), (3227, 7960), (3688, 6965), (3980, 6454), (4610, 5572)]