31398220

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{23}}^1\times {\mathrm{199}}^1$

素因数の和:252

約数の個数: 96

約数和(自身を含む): 80640000

約数和(自身を除く): 49241780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 70, 92, 98, 115, 140, 161, 196, 199, 230, 245, 322, 343, 398, 460, 490, 644, 686, 796, 805, 980, 995, 1127, 1372, 1393, 1610, 1715, 1990, 2254, 2786, 3220, 3430, 3980, 4508, 4577, 5572, 5635, 6860, 6965, 7889, 9154, 9751, 11270, 13930, 15778, 18308, 19502, 22540, 22885, 27860, 31556, 32039, 39004, 39445, 45770, 48755, 64078, 68257, 78890, 91540, 97510, 128156, 136514, 157780, 160195, 195020, 224273, 273028, 320390, 341285, 448546, 640780, 682570, 897092, 1121365, 1365140, 1569911, 2242730, 3139822, 4485460, 6279644, 7849555, 15699110, 31398220]

約数ペア:

[(1, 31398220), (2, 15699110), (4, 7849555), (5, 6279644), (7, 4485460), (10, 3139822), (14, 2242730), (20, 1569911), (23, 1365140), (28, 1121365), (35, 897092), (46, 682570), (49, 640780), (70, 448546), (92, 341285), (98, 320390), (115, 273028), (140, 224273), (161, 195020), (196, 160195), (199, 157780), (230, 136514), (245, 128156), (322, 97510), (343, 91540), (398, 78890), (460, 68257), (490, 64078), (644, 48755), (686, 45770), (796, 39445), (805, 39004), (980, 32039), (995, 31556), (1127, 27860), (1372, 22885), (1393, 22540), (1610, 19502), (1715, 18308), (1990, 15778), (2254, 13930), (2786, 11270), (3220, 9751), (3430, 9154), (3980, 7889), (4508, 6965), (4577, 6860), (5572, 5635)]