81395860

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6389}}^1$

素因数の和:6425

約数の個数: 72

約数和(自身を含む): 214167240

約数和(自身を除く): 132771380

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1820, 2548, 3185, 6370, 6389, 12740, 12778, 25556, 31945, 44723, 63890, 83057, 89446, 127780, 166114, 178892, 223615, 313061, 332228, 415285, 447230, 581399, 626122, 830570, 894460, 1162798, 1252244, 1565305, 1661140, 2325596, 2906995, 3130610, 4069793, 5813990, 6261220, 8139586, 11627980, 16279172, 20348965, 40697930, 81395860]

約数ペア:

[(1, 81395860), (2, 40697930), (4, 20348965), (5, 16279172), (7, 11627980), (10, 8139586), (13, 6261220), (14, 5813990), (20, 4069793), (26, 3130610), (28, 2906995), (35, 2325596), (49, 1661140), (52, 1565305), (65, 1252244), (70, 1162798), (91, 894460), (98, 830570), (130, 626122), (140, 581399), (182, 447230), (196, 415285), (245, 332228), (260, 313061), (364, 223615), (455, 178892), (490, 166114), (637, 127780), (910, 89446), (980, 83057), (1274, 63890), (1820, 44723), (2548, 31945), (3185, 25556), (6370, 12778), (6389, 12740)]