81970020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41399}}^1$

素因数の和:41425

約数の個数: 72

約数和(自身を含む): 271252800

約数和(自身を除く): 189282780

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 41399, 82798, 124197, 165596, 206995, 248394, 372591, 413990, 455389, 496788, 620985, 745182, 827980, 910778, 1241970, 1366167, 1490364, 1821556, 1862955, 2276945, 2483940, 2732334, 3725910, 4098501, 4553890, 5464668, 6830835, 7451820, 8197002, 9107780, 13661670, 16394004, 20492505, 27323340, 40985010, 81970020]

約数ペア:

[(1, 81970020), (2, 40985010), (3, 27323340), (4, 20492505), (5, 16394004), (6, 13661670), (9, 9107780), (10, 8197002), (11, 7451820), (12, 6830835), (15, 5464668), (18, 4553890), (20, 4098501), (22, 3725910), (30, 2732334), (33, 2483940), (36, 2276945), (44, 1862955), (45, 1821556), (55, 1490364), (60, 1366167), (66, 1241970), (90, 910778), (99, 827980), (110, 745182), (132, 620985), (165, 496788), (180, 455389), (198, 413990), (220, 372591), (330, 248394), (396, 206995), (495, 165596), (660, 124197), (990, 82798), (1980, 41399)]