1781820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{521}}^1$

素因数の和:555

約数の個数: 72

約数和(自身を含む): 5700240

約数和(自身を除く): 3918420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 45, 57, 60, 76, 90, 95, 114, 171, 180, 190, 228, 285, 342, 380, 521, 570, 684, 855, 1042, 1140, 1563, 1710, 2084, 2605, 3126, 3420, 4689, 5210, 6252, 7815, 9378, 9899, 10420, 15630, 18756, 19798, 23445, 29697, 31260, 39596, 46890, 49495, 59394, 89091, 93780, 98990, 118788, 148485, 178182, 197980, 296970, 356364, 445455, 593940, 890910, 1781820]

約数ペア:

[(1, 1781820), (2, 890910), (3, 593940), (4, 445455), (5, 356364), (6, 296970), (9, 197980), (10, 178182), (12, 148485), (15, 118788), (18, 98990), (19, 93780), (20, 89091), (30, 59394), (36, 49495), (38, 46890), (45, 39596), (57, 31260), (60, 29697), (76, 23445), (90, 19798), (95, 18756), (114, 15630), (171, 10420), (180, 9899), (190, 9378), (228, 7815), (285, 6252), (342, 5210), (380, 4689), (521, 3420), (570, 3126), (684, 2605), (855, 2084), (1042, 1710), (1140, 1563)]