78705220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{991}}^1$

素因数の和:1049

約数の個数: 72

約数和(自身を含む): 190487808

約数和(自身を除く): 111782588

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 361, 380, 418, 722, 836, 991, 1045, 1444, 1805, 1982, 2090, 3610, 3964, 3971, 4180, 4955, 7220, 7942, 9910, 10901, 15884, 18829, 19820, 19855, 21802, 37658, 39710, 43604, 54505, 75316, 79420, 94145, 109010, 188290, 207119, 218020, 357751, 376580, 414238, 715502, 828476, 1035595, 1431004, 1788755, 2071190, 3577510, 3935261, 4142380, 7155020, 7870522, 15741044, 19676305, 39352610, 78705220]

約数ペア:

[(1, 78705220), (2, 39352610), (4, 19676305), (5, 15741044), (10, 7870522), (11, 7155020), (19, 4142380), (20, 3935261), (22, 3577510), (38, 2071190), (44, 1788755), (55, 1431004), (76, 1035595), (95, 828476), (110, 715502), (190, 414238), (209, 376580), (220, 357751), (361, 218020), (380, 207119), (418, 188290), (722, 109010), (836, 94145), (991, 79420), (1045, 75316), (1444, 54505), (1805, 43604), (1982, 39710), (2090, 37658), (3610, 21802), (3964, 19855), (3971, 19820), (4180, 18829), (4955, 15884), (7220, 10901), (7942, 9910)]