About the Number

128388780

128388779 ← → 128388781

2進数表記:111101001110000111010101100

漢数字表記:一億二千八百三十八万八千七百八十

素因数分解:

2 2 × 3 3 × 5 1 × 13 1 × 18289 1

素因数の和:18320
約数の個数: 96
約数和(自身を含む): 430180800
約数和(自身を除く): 301792020

約数列:
[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 27, 30, 36, 39, 45, 52, 54, 60, 65, 78, 90, 108, 117, 130, 135, 156, 180, 195, 234, 260, 270, 351, 390, 468, 540, 585, 702, 780, 1170, 1404, 1755, 2340, 3510, 7020, 18289, 36578, 54867, 73156, 91445, 109734, 164601, 182890, 219468, 237757, 274335, 329202, 365780, 475514, 493803, 548670, 658404, 713271, 823005, 951028, 987606, 1097340, 1188785, 1426542, 1646010, 1975212, 2139813, 2377570, 2469015, 2853084, 3292020, 3566355, 4279626, 4755140, 4938030, 6419439, 7132710, 8559252, 9876060, 10699065, 12838878, 14265420, 21398130, 25677756, 32097195, 42796260, 64194390, 128388780]

約数ペア:
[(1, 128388780), (2, 64194390), (3, 42796260), (4, 32097195), (5, 25677756), (6, 21398130), (9, 14265420), (10, 12838878), (12, 10699065), (13, 9876060), (15, 8559252), (18, 7132710), (20, 6419439), (26, 4938030), (27, 4755140), (30, 4279626), (36, 3566355), (39, 3292020), (45, 2853084), (52, 2469015), (54, 2377570), (60, 2139813), (65, 1975212), (78, 1646010), (90, 1426542), (108, 1188785), (117, 1097340), (130, 987606), (135, 951028), (156, 823005), (180, 713271), (195, 658404), (234, 548670), (260, 493803), (270, 475514), (351, 365780), (390, 329202), (468, 274335), (540, 237757), (585, 219468), (702, 182890), (780, 164601), (1170, 109734), (1404, 91445), (1755, 73156), (2340, 54867), (3510, 36578), (7020, 18289)]

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