20489490

素因数分解:

$2^1\times 3^3\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{293}}^1$

素因数の和:353

約数の個数: 128

約数和(自身を含む): 64350720

約数和(自身を除く): 43861230

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 37, 42, 45, 54, 63, 70, 74, 90, 105, 111, 126, 135, 185, 189, 210, 222, 259, 270, 293, 315, 333, 370, 378, 518, 555, 586, 630, 666, 777, 879, 945, 999, 1110, 1295, 1465, 1554, 1665, 1758, 1890, 1998, 2051, 2331, 2590, 2637, 2930, 3330, 3885, 4102, 4395, 4662, 4995, 5274, 6153, 6993, 7770, 7911, 8790, 9990, 10255, 10841, 11655, 12306, 13185, 13986, 15822, 18459, 20510, 21682, 23310, 26370, 30765, 32523, 34965, 36918, 39555, 54205, 55377, 61530, 65046, 69930, 75887, 79110, 92295, 97569, 108410, 110754, 151774, 162615, 184590, 195138, 227661, 276885, 292707, 325230, 379435, 455322, 487845, 553770, 585414, 682983, 758870, 975690, 1138305, 1365966, 1463535, 2048949, 2276610, 2927070, 3414915, 4097898, 6829830, 10244745, 20489490]

約数ペア:

[(1, 20489490), (2, 10244745), (3, 6829830), (5, 4097898), (6, 3414915), (7, 2927070), (9, 2276610), (10, 2048949), (14, 1463535), (15, 1365966), (18, 1138305), (21, 975690), (27, 758870), (30, 682983), (35, 585414), (37, 553770), (42, 487845), (45, 455322), (54, 379435), (63, 325230), (70, 292707), (74, 276885), (90, 227661), (105, 195138), (111, 184590), (126, 162615), (135, 151774), (185, 110754), (189, 108410), (210, 97569), (222, 92295), (259, 79110), (270, 75887), (293, 69930), (315, 65046), (333, 61530), (370, 55377), (378, 54205), (518, 39555), (555, 36918), (586, 34965), (630, 32523), (666, 30765), (777, 26370), (879, 23310), (945, 21682), (999, 20510), (1110, 18459), (1295, 15822), (1465, 13986), (1554, 13185), (1665, 12306), (1758, 11655), (1890, 10841), (1998, 10255), (2051, 9990), (2331, 8790), (2590, 7911), (2637, 7770), (2930, 6993), (3330, 6153), (3885, 5274), (4102, 4995), (4395, 4662)]