209901915

素因数分解:

$3^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{359}}^1$

素因数の和:505

約数の個数: 64

約数和(自身を含む): 385689600

約数和(自身を除く): 175787685

約数列:

[1, 3, 5, 9, 15, 27, 45, 61, 71, 135, 183, 213, 305, 355, 359, 549, 639, 915, 1065, 1077, 1647, 1795, 1917, 2745, 3195, 3231, 4331, 5385, 8235, 9585, 9693, 12993, 16155, 21655, 21899, 25489, 38979, 48465, 64965, 65697, 76467, 109495, 116937, 127445, 194895, 197091, 229401, 328485, 382335, 584685, 591273, 688203, 985455, 1147005, 1554829, 2956365, 3441015, 4664487, 7774145, 13993461, 23322435, 41980383, 69967305, 209901915]

約数ペア:

[(1, 209901915), (3, 69967305), (5, 41980383), (9, 23322435), (15, 13993461), (27, 7774145), (45, 4664487), (61, 3441015), (71, 2956365), (135, 1554829), (183, 1147005), (213, 985455), (305, 688203), (355, 591273), (359, 584685), (549, 382335), (639, 328485), (915, 229401), (1065, 197091), (1077, 194895), (1647, 127445), (1795, 116937), (1917, 109495), (2745, 76467), (3195, 65697), (3231, 64965), (4331, 48465), (5385, 38979), (8235, 25489), (9585, 21899), (9693, 21655), (12993, 16155)]