21559780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{59}}^1\times {\mathrm{151}}^1$

素因数の和:241

約数の個数: 72

約数和(自身を含む): 50944320

約数和(自身を除く): 29384540

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 59, 110, 118, 121, 151, 220, 236, 242, 295, 302, 484, 590, 604, 605, 649, 755, 1180, 1210, 1298, 1510, 1661, 2420, 2596, 3020, 3245, 3322, 6490, 6644, 7139, 8305, 8909, 12980, 14278, 16610, 17818, 18271, 28556, 33220, 35636, 35695, 36542, 44545, 71390, 73084, 89090, 91355, 97999, 142780, 178180, 182710, 195998, 365420, 391996, 489995, 979990, 1077989, 1959980, 2155978, 4311956, 5389945, 10779890, 21559780]

約数ペア:

[(1, 21559780), (2, 10779890), (4, 5389945), (5, 4311956), (10, 2155978), (11, 1959980), (20, 1077989), (22, 979990), (44, 489995), (55, 391996), (59, 365420), (110, 195998), (118, 182710), (121, 178180), (151, 142780), (220, 97999), (236, 91355), (242, 89090), (295, 73084), (302, 71390), (484, 44545), (590, 36542), (604, 35695), (605, 35636), (649, 33220), (755, 28556), (1180, 18271), (1210, 17818), (1298, 16610), (1510, 14278), (1661, 12980), (2420, 8909), (2596, 8305), (3020, 7139), (3245, 6644), (3322, 6490)]