81681280

素因数分解:

$2^7\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{179}}^1$

素因数の和:252

約数の個数: 128

約数和(自身を含む): 211507200

約数和(自身を除く): 129825920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 31, 32, 40, 46, 62, 64, 80, 92, 115, 124, 128, 155, 160, 179, 184, 230, 248, 310, 320, 358, 368, 460, 496, 620, 640, 713, 716, 736, 895, 920, 992, 1240, 1426, 1432, 1472, 1790, 1840, 1984, 2480, 2852, 2864, 2944, 3565, 3580, 3680, 3968, 4117, 4960, 5549, 5704, 5728, 7130, 7160, 7360, 8234, 9920, 11098, 11408, 11456, 14260, 14320, 14720, 16468, 19840, 20585, 22196, 22816, 22912, 27745, 28520, 28640, 32936, 41170, 44392, 45632, 55490, 57040, 57280, 65872, 82340, 88784, 91264, 110980, 114080, 114560, 127627, 131744, 164680, 177568, 221960, 228160, 255254, 263488, 329360, 355136, 443920, 456320, 510508, 526976, 638135, 658720, 710272, 887840, 1021016, 1276270, 1317440, 1775680, 2042032, 2552540, 2634880, 3551360, 4084064, 5105080, 8168128, 10210160, 16336256, 20420320, 40840640, 81681280]

約数ペア:

[(1, 81681280), (2, 40840640), (4, 20420320), (5, 16336256), (8, 10210160), (10, 8168128), (16, 5105080), (20, 4084064), (23, 3551360), (31, 2634880), (32, 2552540), (40, 2042032), (46, 1775680), (62, 1317440), (64, 1276270), (80, 1021016), (92, 887840), (115, 710272), (124, 658720), (128, 638135), (155, 526976), (160, 510508), (179, 456320), (184, 443920), (230, 355136), (248, 329360), (310, 263488), (320, 255254), (358, 228160), (368, 221960), (460, 177568), (496, 164680), (620, 131744), (640, 127627), (713, 114560), (716, 114080), (736, 110980), (895, 91264), (920, 88784), (992, 82340), (1240, 65872), (1426, 57280), (1432, 57040), (1472, 55490), (1790, 45632), (1840, 44392), (1984, 41170), (2480, 32936), (2852, 28640), (2864, 28520), (2944, 27745), (3565, 22912), (3580, 22816), (3680, 22196), (3968, 20585), (4117, 19840), (4960, 16468), (5549, 14720), (5704, 14320), (5728, 14260), (7130, 11456), (7160, 11408), (7360, 11098), (8234, 9920)]