821540860

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{563}}^1\times {\mathrm{1489}}^1$

素因数の和:2075

約数の個数: 72

約数和(自身を含む): 2011821840

約数和(自身を除く): 1190280980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 563, 980, 1126, 1489, 2252, 2815, 2978, 3941, 5630, 5956, 7445, 7882, 10423, 11260, 14890, 15764, 19705, 20846, 27587, 29780, 39410, 41692, 52115, 55174, 72961, 78820, 104230, 110348, 137935, 145922, 208460, 275870, 291844, 364805, 551740, 729610, 838307, 1459220, 1676614, 3353228, 4191535, 5868149, 8383070, 11736298, 16766140, 23472596, 29340745, 41077043, 58681490, 82154086, 117362980, 164308172, 205385215, 410770430, 821540860]

約数ペア:

[(1, 821540860), (2, 410770430), (4, 205385215), (5, 164308172), (7, 117362980), (10, 82154086), (14, 58681490), (20, 41077043), (28, 29340745), (35, 23472596), (49, 16766140), (70, 11736298), (98, 8383070), (140, 5868149), (196, 4191535), (245, 3353228), (490, 1676614), (563, 1459220), (980, 838307), (1126, 729610), (1489, 551740), (2252, 364805), (2815, 291844), (2978, 275870), (3941, 208460), (5630, 145922), (5956, 137935), (7445, 110348), (7882, 104230), (10423, 78820), (11260, 72961), (14890, 55174), (15764, 52115), (19705, 41692), (20846, 39410), (27587, 29780)]