28978380

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{809}}^1$

素因数の和:1023

約数の個数: 72

約数和(自身を含む): 88452000

約数和(自身を除く): 59473620

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 199, 398, 597, 796, 809, 995, 1194, 1618, 1791, 1990, 2388, 2427, 2985, 3236, 3582, 3980, 4045, 4854, 5970, 7164, 7281, 8090, 8955, 9708, 11940, 12135, 14562, 16180, 17910, 24270, 29124, 35820, 36405, 48540, 72810, 145620, 160991, 321982, 482973, 643964, 804955, 965946, 1448919, 1609910, 1931892, 2414865, 2897838, 3219820, 4829730, 5795676, 7244595, 9659460, 14489190, 28978380]

約数ペア:

[(1, 28978380), (2, 14489190), (3, 9659460), (4, 7244595), (5, 5795676), (6, 4829730), (9, 3219820), (10, 2897838), (12, 2414865), (15, 1931892), (18, 1609910), (20, 1448919), (30, 965946), (36, 804955), (45, 643964), (60, 482973), (90, 321982), (180, 160991), (199, 145620), (398, 72810), (597, 48540), (796, 36405), (809, 35820), (995, 29124), (1194, 24270), (1618, 17910), (1791, 16180), (1990, 14562), (2388, 12135), (2427, 11940), (2985, 9708), (3236, 8955), (3582, 8090), (3980, 7281), (4045, 7164), (4854, 5970)]