20919420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1$

素因数の和:232

約数の個数: 144

約数和(自身を含む): 68769792

約数和(自身を除く): 47850372

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 31, 36, 45, 46, 60, 62, 69, 90, 92, 93, 115, 124, 138, 155, 163, 180, 186, 207, 230, 276, 279, 310, 326, 345, 372, 414, 460, 465, 489, 558, 620, 652, 690, 713, 815, 828, 930, 978, 1035, 1116, 1380, 1395, 1426, 1467, 1630, 1860, 1956, 2070, 2139, 2445, 2790, 2852, 2934, 3260, 3565, 3749, 4140, 4278, 4890, 5053, 5580, 5868, 6417, 7130, 7335, 7498, 8556, 9780, 10106, 10695, 11247, 12834, 14260, 14670, 14996, 15159, 18745, 20212, 21390, 22494, 25265, 25668, 29340, 30318, 32085, 33741, 37490, 42780, 44988, 45477, 50530, 56235, 60636, 64170, 67482, 74980, 75795, 90954, 101060, 112470, 116219, 128340, 134964, 151590, 168705, 181908, 224940, 227385, 232438, 303180, 337410, 348657, 454770, 464876, 581095, 674820, 697314, 909540, 1045971, 1162190, 1394628, 1743285, 2091942, 2324380, 3486570, 4183884, 5229855, 6973140, 10459710, 20919420]

約数ペア:

[(1, 20919420), (2, 10459710), (3, 6973140), (4, 5229855), (5, 4183884), (6, 3486570), (9, 2324380), (10, 2091942), (12, 1743285), (15, 1394628), (18, 1162190), (20, 1045971), (23, 909540), (30, 697314), (31, 674820), (36, 581095), (45, 464876), (46, 454770), (60, 348657), (62, 337410), (69, 303180), (90, 232438), (92, 227385), (93, 224940), (115, 181908), (124, 168705), (138, 151590), (155, 134964), (163, 128340), (180, 116219), (186, 112470), (207, 101060), (230, 90954), (276, 75795), (279, 74980), (310, 67482), (326, 64170), (345, 60636), (372, 56235), (414, 50530), (460, 45477), (465, 44988), (489, 42780), (558, 37490), (620, 33741), (652, 32085), (690, 30318), (713, 29340), (815, 25668), (828, 25265), (930, 22494), (978, 21390), (1035, 20212), (1116, 18745), (1380, 15159), (1395, 14996), (1426, 14670), (1467, 14260), (1630, 12834), (1860, 11247), (1956, 10695), (2070, 10106), (2139, 9780), (2445, 8556), (2790, 7498), (2852, 7335), (2934, 7130), (3260, 6417), (3565, 5868), (3749, 5580), (4140, 5053), (4278, 4890)]