78856540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{1949}}^1$

素因数の和:1999

約数の個数: 72

約数和(自身を含む): 201146400

約数和(自身を除く): 122289860

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 85, 119, 140, 170, 238, 289, 340, 476, 578, 595, 1156, 1190, 1445, 1949, 2023, 2380, 2890, 3898, 4046, 5780, 7796, 8092, 9745, 10115, 13643, 19490, 20230, 27286, 33133, 38980, 40460, 54572, 66266, 68215, 132532, 136430, 165665, 231931, 272860, 331330, 463862, 563261, 662660, 927724, 1126522, 1159655, 2253044, 2319310, 2816305, 3942827, 4638620, 5632610, 7885654, 11265220, 15771308, 19714135, 39428270, 78856540]

約数ペア:

[(1, 78856540), (2, 39428270), (4, 19714135), (5, 15771308), (7, 11265220), (10, 7885654), (14, 5632610), (17, 4638620), (20, 3942827), (28, 2816305), (34, 2319310), (35, 2253044), (68, 1159655), (70, 1126522), (85, 927724), (119, 662660), (140, 563261), (170, 463862), (238, 331330), (289, 272860), (340, 231931), (476, 165665), (578, 136430), (595, 132532), (1156, 68215), (1190, 66266), (1445, 54572), (1949, 40460), (2023, 38980), (2380, 33133), (2890, 27286), (3898, 20230), (4046, 19490), (5780, 13643), (7796, 10115), (8092, 9745)]