20805110

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{313}}^1$

素因数の和:377

約数の個数: 48

約数和(自身を含む): 41643936

約数和(自身を除く): 20838826

約数列:

[1, 2, 5, 10, 17, 23, 34, 46, 85, 115, 170, 230, 289, 313, 391, 578, 626, 782, 1445, 1565, 1955, 2890, 3130, 3910, 5321, 6647, 7199, 10642, 13294, 14398, 26605, 33235, 35995, 53210, 66470, 71990, 90457, 122383, 180914, 244766, 452285, 611915, 904570, 1223830, 2080511, 4161022, 10402555, 20805110]

約数ペア:

[(1, 20805110), (2, 10402555), (5, 4161022), (10, 2080511), (17, 1223830), (23, 904570), (34, 611915), (46, 452285), (85, 244766), (115, 180914), (170, 122383), (230, 90457), (289, 71990), (313, 66470), (391, 53210), (578, 35995), (626, 33235), (782, 26605), (1445, 14398), (1565, 13294), (1955, 10642), (2890, 7199), (3130, 6647), (3910, 5321)]