21244275

素因数分解:

$3^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{269}}^1$

素因数の和:307

約数の個数: 72

約数和(自身を含む): 42653520

約数和(自身を除く): 21409245

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 39, 45, 65, 75, 81, 117, 135, 195, 225, 243, 269, 325, 351, 405, 585, 675, 807, 975, 1053, 1215, 1345, 1755, 2025, 2421, 2925, 3159, 3497, 4035, 5265, 6075, 6725, 7263, 8775, 10491, 12105, 15795, 17485, 20175, 21789, 26325, 31473, 36315, 52455, 60525, 65367, 78975, 87425, 94419, 108945, 157365, 181575, 262275, 283257, 326835, 472095, 544725, 786825, 849771, 1416285, 1634175, 2360475, 4248855, 7081425, 21244275]

約数ペア:

[(1, 21244275), (3, 7081425), (5, 4248855), (9, 2360475), (13, 1634175), (15, 1416285), (25, 849771), (27, 786825), (39, 544725), (45, 472095), (65, 326835), (75, 283257), (81, 262275), (117, 181575), (135, 157365), (195, 108945), (225, 94419), (243, 87425), (269, 78975), (325, 65367), (351, 60525), (405, 52455), (585, 36315), (675, 31473), (807, 26325), (975, 21789), (1053, 20175), (1215, 17485), (1345, 15795), (1755, 12105), (2025, 10491), (2421, 8775), (2925, 7263), (3159, 6725), (3497, 6075), (4035, 5265)]