21040790

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1$

素因数の和:177

約数の個数: 64

約数和(自身を含む): 42517440

約数和(自身を除く): 21476650

約数列:

[1, 2, 5, 10, 19, 37, 38, 41, 73, 74, 82, 95, 146, 185, 190, 205, 365, 370, 410, 703, 730, 779, 1387, 1406, 1517, 1558, 2701, 2774, 2993, 3034, 3515, 3895, 5402, 5986, 6935, 7030, 7585, 7790, 13505, 13870, 14965, 15170, 27010, 28823, 29930, 51319, 56867, 57646, 102638, 110741, 113734, 144115, 221482, 256595, 284335, 288230, 513190, 553705, 568670, 1107410, 2104079, 4208158, 10520395, 21040790]

約数ペア:

[(1, 21040790), (2, 10520395), (5, 4208158), (10, 2104079), (19, 1107410), (37, 568670), (38, 553705), (41, 513190), (73, 288230), (74, 284335), (82, 256595), (95, 221482), (146, 144115), (185, 113734), (190, 110741), (205, 102638), (365, 57646), (370, 56867), (410, 51319), (703, 29930), (730, 28823), (779, 27010), (1387, 15170), (1406, 14965), (1517, 13870), (1558, 13505), (2701, 7790), (2774, 7585), (2993, 7030), (3034, 6935), (3515, 5986), (3895, 5402)]