19801210

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{227}}^1$

素因数の和:319

約数の個数: 64

約数和(自身を含む): 42747264

約数和(自身を除く): 22946054

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 61, 65, 110, 122, 130, 143, 227, 286, 305, 454, 610, 671, 715, 793, 1135, 1342, 1430, 1586, 2270, 2497, 2951, 3355, 3965, 4994, 5902, 6710, 7930, 8723, 12485, 13847, 14755, 17446, 24970, 27694, 29510, 32461, 43615, 64922, 69235, 87230, 138470, 152317, 162305, 180011, 304634, 324610, 360022, 761585, 900055, 1523170, 1800110, 1980121, 3960242, 9900605, 19801210]

約数ペア:

[(1, 19801210), (2, 9900605), (5, 3960242), (10, 1980121), (11, 1800110), (13, 1523170), (22, 900055), (26, 761585), (55, 360022), (61, 324610), (65, 304634), (110, 180011), (122, 162305), (130, 152317), (143, 138470), (227, 87230), (286, 69235), (305, 64922), (454, 43615), (610, 32461), (671, 29510), (715, 27694), (793, 24970), (1135, 17446), (1342, 14755), (1430, 13847), (1586, 12485), (2270, 8723), (2497, 7930), (2951, 6710), (3355, 5902), (3965, 4994)]