20335140

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16139}}^1$

素因数の和:16161

約数の個数: 72

約数和(自身を含む): 70499520

約数和(自身を除く): 50164380

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16139, 32278, 48417, 64556, 80695, 96834, 112973, 145251, 161390, 193668, 225946, 242085, 290502, 322780, 338919, 451892, 484170, 564865, 581004, 677838, 726255, 968340, 1016757, 1129730, 1355676, 1452510, 1694595, 2033514, 2259460, 2905020, 3389190, 4067028, 5083785, 6778380, 10167570, 20335140]

約数ペア:

[(1, 20335140), (2, 10167570), (3, 6778380), (4, 5083785), (5, 4067028), (6, 3389190), (7, 2905020), (9, 2259460), (10, 2033514), (12, 1694595), (14, 1452510), (15, 1355676), (18, 1129730), (20, 1016757), (21, 968340), (28, 726255), (30, 677838), (35, 581004), (36, 564865), (42, 484170), (45, 451892), (60, 338919), (63, 322780), (70, 290502), (84, 242085), (90, 225946), (105, 193668), (126, 161390), (140, 145251), (180, 112973), (210, 96834), (252, 80695), (315, 64556), (420, 48417), (630, 32278), (1260, 16139)]