21505140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{3229}}^1$

素因数の和:3281

約数の個数: 72

約数和(自身を含む): 67016040

約数和(自身を除く): 45510900

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 37, 45, 60, 74, 90, 111, 148, 180, 185, 222, 333, 370, 444, 555, 666, 740, 1110, 1332, 1665, 2220, 3229, 3330, 6458, 6660, 9687, 12916, 16145, 19374, 29061, 32290, 38748, 48435, 58122, 64580, 96870, 116244, 119473, 145305, 193740, 238946, 290610, 358419, 477892, 581220, 597365, 716838, 1075257, 1194730, 1433676, 1792095, 2150514, 2389460, 3584190, 4301028, 5376285, 7168380, 10752570, 21505140]

約数ペア:

[(1, 21505140), (2, 10752570), (3, 7168380), (4, 5376285), (5, 4301028), (6, 3584190), (9, 2389460), (10, 2150514), (12, 1792095), (15, 1433676), (18, 1194730), (20, 1075257), (30, 716838), (36, 597365), (37, 581220), (45, 477892), (60, 358419), (74, 290610), (90, 238946), (111, 193740), (148, 145305), (180, 119473), (185, 116244), (222, 96870), (333, 64580), (370, 58122), (444, 48435), (555, 38748), (666, 32290), (740, 29061), (1110, 19374), (1332, 16145), (1665, 12916), (2220, 9687), (3229, 6660), (3330, 6458)]