648807680

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{197}}^1$

素因数の和:332

約数の個数: 144

約数和(自身を含む): 1631798784

約数和(自身を除く): 982991104

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 83, 124, 128, 155, 160, 166, 197, 248, 256, 310, 320, 332, 394, 415, 496, 620, 640, 664, 788, 830, 985, 992, 1240, 1280, 1328, 1576, 1660, 1970, 1984, 2480, 2573, 2656, 3152, 3320, 3940, 3968, 4960, 5146, 5312, 6107, 6304, 6640, 7880, 7936, 9920, 10292, 10624, 12214, 12608, 12865, 13280, 15760, 16351, 19840, 20584, 21248, 24428, 25216, 25730, 26560, 30535, 31520, 32702, 39680, 41168, 48856, 50432, 51460, 53120, 61070, 63040, 65404, 81755, 82336, 97712, 102920, 106240, 122140, 126080, 130808, 163510, 164672, 195424, 205840, 244280, 252160, 261616, 327020, 329344, 390848, 411680, 488560, 506881, 523232, 654040, 658688, 781696, 823360, 977120, 1013762, 1046464, 1308080, 1563392, 1646720, 1954240, 2027524, 2092928, 2534405, 2616160, 3293440, 3908480, 4055048, 4185856, 5068810, 5232320, 7816960, 8110096, 10137620, 10464640, 16220192, 20275240, 20929280, 32440384, 40550480, 64880768, 81100960, 129761536, 162201920, 324403840, 648807680]

約数ペア:

[(1, 648807680), (2, 324403840), (4, 162201920), (5, 129761536), (8, 81100960), (10, 64880768), (16, 40550480), (20, 32440384), (31, 20929280), (32, 20275240), (40, 16220192), (62, 10464640), (64, 10137620), (80, 8110096), (83, 7816960), (124, 5232320), (128, 5068810), (155, 4185856), (160, 4055048), (166, 3908480), (197, 3293440), (248, 2616160), (256, 2534405), (310, 2092928), (320, 2027524), (332, 1954240), (394, 1646720), (415, 1563392), (496, 1308080), (620, 1046464), (640, 1013762), (664, 977120), (788, 823360), (830, 781696), (985, 658688), (992, 654040), (1240, 523232), (1280, 506881), (1328, 488560), (1576, 411680), (1660, 390848), (1970, 329344), (1984, 327020), (2480, 261616), (2573, 252160), (2656, 244280), (3152, 205840), (3320, 195424), (3940, 164672), (3968, 163510), (4960, 130808), (5146, 126080), (5312, 122140), (6107, 106240), (6304, 102920), (6640, 97712), (7880, 82336), (7936, 81755), (9920, 65404), (10292, 63040), (10624, 61070), (12214, 53120), (12608, 51460), (12865, 50432), (13280, 48856), (15760, 41168), (16351, 39680), (19840, 32702), (20584, 31520), (21248, 30535), (24428, 26560), (25216, 25730)]