20668320

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{463}}^1$

素因数の和:515

約数の個数: 144

約数和(自身を含む): 72963072

約数和(自身を除く): 52294752

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 31, 32, 36, 40, 45, 48, 60, 62, 72, 80, 90, 93, 96, 120, 124, 144, 155, 160, 180, 186, 240, 248, 279, 288, 310, 360, 372, 463, 465, 480, 496, 558, 620, 720, 744, 926, 930, 992, 1116, 1240, 1389, 1395, 1440, 1488, 1852, 1860, 2232, 2315, 2480, 2778, 2790, 2976, 3704, 3720, 4167, 4464, 4630, 4960, 5556, 5580, 6945, 7408, 7440, 8334, 8928, 9260, 11112, 11160, 13890, 14353, 14816, 14880, 16668, 18520, 20835, 22224, 22320, 27780, 28706, 33336, 37040, 41670, 43059, 44448, 44640, 55560, 57412, 66672, 71765, 74080, 83340, 86118, 111120, 114824, 129177, 133344, 143530, 166680, 172236, 215295, 222240, 229648, 258354, 287060, 333360, 344472, 430590, 459296, 516708, 574120, 645885, 666720, 688944, 861180, 1033416, 1148240, 1291770, 1377888, 1722360, 2066832, 2296480, 2583540, 3444720, 4133664, 5167080, 6889440, 10334160, 20668320]

約数ペア:

[(1, 20668320), (2, 10334160), (3, 6889440), (4, 5167080), (5, 4133664), (6, 3444720), (8, 2583540), (9, 2296480), (10, 2066832), (12, 1722360), (15, 1377888), (16, 1291770), (18, 1148240), (20, 1033416), (24, 861180), (30, 688944), (31, 666720), (32, 645885), (36, 574120), (40, 516708), (45, 459296), (48, 430590), (60, 344472), (62, 333360), (72, 287060), (80, 258354), (90, 229648), (93, 222240), (96, 215295), (120, 172236), (124, 166680), (144, 143530), (155, 133344), (160, 129177), (180, 114824), (186, 111120), (240, 86118), (248, 83340), (279, 74080), (288, 71765), (310, 66672), (360, 57412), (372, 55560), (463, 44640), (465, 44448), (480, 43059), (496, 41670), (558, 37040), (620, 33336), (720, 28706), (744, 27780), (926, 22320), (930, 22224), (992, 20835), (1116, 18520), (1240, 16668), (1389, 14880), (1395, 14816), (1440, 14353), (1488, 13890), (1852, 11160), (1860, 11112), (2232, 9260), (2315, 8928), (2480, 8334), (2778, 7440), (2790, 7408), (2976, 6945), (3704, 5580), (3720, 5556), (4167, 4960), (4464, 4630)]