865040

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{983}}^1$

素因数の和:1007

約数の個数: 40

約数和(自身を含む): 2196288

約数和(自身を除く): 1331248

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 983, 1966, 3932, 4915, 7864, 9830, 10813, 15728, 19660, 21626, 39320, 43252, 54065, 78640, 86504, 108130, 173008, 216260, 432520, 865040]

約数ペア:

[(1, 865040), (2, 432520), (4, 216260), (5, 173008), (8, 108130), (10, 86504), (11, 78640), (16, 54065), (20, 43252), (22, 39320), (40, 21626), (44, 19660), (55, 15728), (80, 10813), (88, 9830), (110, 7864), (176, 4915), (220, 3932), (440, 1966), (880, 983)]