21000100

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1123}}^1$

素因数の和:1165

約数の個数: 72

約数和(自身を含む): 52684128

約数和(自身を除く): 31684028

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 25, 34, 44, 50, 55, 68, 85, 100, 110, 170, 187, 220, 275, 340, 374, 425, 550, 748, 850, 935, 1100, 1123, 1700, 1870, 2246, 3740, 4492, 4675, 5615, 9350, 11230, 12353, 18700, 19091, 22460, 24706, 28075, 38182, 49412, 56150, 61765, 76364, 95455, 112300, 123530, 190910, 210001, 247060, 308825, 381820, 420002, 477275, 617650, 840004, 954550, 1050005, 1235300, 1909100, 2100010, 4200020, 5250025, 10500050, 21000100]

約数ペア:

[(1, 21000100), (2, 10500050), (4, 5250025), (5, 4200020), (10, 2100010), (11, 1909100), (17, 1235300), (20, 1050005), (22, 954550), (25, 840004), (34, 617650), (44, 477275), (50, 420002), (55, 381820), (68, 308825), (85, 247060), (100, 210001), (110, 190910), (170, 123530), (187, 112300), (220, 95455), (275, 76364), (340, 61765), (374, 56150), (425, 49412), (550, 38182), (748, 28075), (850, 24706), (935, 22460), (1100, 19091), (1123, 18700), (1700, 12353), (1870, 11230), (2246, 9350), (3740, 5615), (4492, 4675)]