81891180

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{631}}^1$

素因数の和:756

約数の個数: 144

約数和(自身を含む): 287099904

約数和(自身を除く): 205208724

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 103, 105, 126, 140, 180, 206, 210, 252, 309, 315, 412, 420, 515, 618, 630, 631, 721, 927, 1030, 1236, 1260, 1262, 1442, 1545, 1854, 1893, 2060, 2163, 2524, 2884, 3090, 3155, 3605, 3708, 3786, 4326, 4417, 4635, 5679, 6180, 6310, 6489, 7210, 7572, 8652, 8834, 9270, 9465, 10815, 11358, 12620, 12978, 13251, 14420, 17668, 18540, 18930, 21630, 22085, 22716, 25956, 26502, 28395, 32445, 37860, 39753, 43260, 44170, 53004, 56790, 64890, 64993, 66255, 79506, 88340, 113580, 129780, 129986, 132510, 159012, 194979, 198765, 259972, 265020, 324965, 389958, 397530, 454951, 584937, 649930, 779916, 795060, 909902, 974895, 1169874, 1299860, 1364853, 1819804, 1949790, 2274755, 2339748, 2729706, 2924685, 3899580, 4094559, 4549510, 5459412, 5849370, 6824265, 8189118, 9099020, 11698740, 13648530, 16378236, 20472795, 27297060, 40945590, 81891180]

約数ペア:

[(1, 81891180), (2, 40945590), (3, 27297060), (4, 20472795), (5, 16378236), (6, 13648530), (7, 11698740), (9, 9099020), (10, 8189118), (12, 6824265), (14, 5849370), (15, 5459412), (18, 4549510), (20, 4094559), (21, 3899580), (28, 2924685), (30, 2729706), (35, 2339748), (36, 2274755), (42, 1949790), (45, 1819804), (60, 1364853), (63, 1299860), (70, 1169874), (84, 974895), (90, 909902), (103, 795060), (105, 779916), (126, 649930), (140, 584937), (180, 454951), (206, 397530), (210, 389958), (252, 324965), (309, 265020), (315, 259972), (412, 198765), (420, 194979), (515, 159012), (618, 132510), (630, 129986), (631, 129780), (721, 113580), (927, 88340), (1030, 79506), (1236, 66255), (1260, 64993), (1262, 64890), (1442, 56790), (1545, 53004), (1854, 44170), (1893, 43260), (2060, 39753), (2163, 37860), (2524, 32445), (2884, 28395), (3090, 26502), (3155, 25956), (3605, 22716), (3708, 22085), (3786, 21630), (4326, 18930), (4417, 18540), (4635, 17668), (5679, 14420), (6180, 13251), (6310, 12978), (6489, 12620), (7210, 11358), (7572, 10815), (8652, 9465), (8834, 9270)]