20953485

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{389}}^1$

素因数の和:432

約数の個数: 80

約数和(自身を含む): 45302400

約数和(自身を除く): 24348915

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 27, 35, 45, 57, 63, 81, 95, 105, 133, 135, 171, 189, 285, 315, 389, 399, 405, 513, 567, 665, 855, 945, 1167, 1197, 1539, 1945, 1995, 2565, 2723, 2835, 3501, 3591, 5835, 5985, 7391, 7695, 8169, 10503, 10773, 13615, 17505, 17955, 22173, 24507, 31509, 36955, 40845, 51737, 52515, 53865, 66519, 73521, 110865, 122535, 155211, 157545, 199557, 220563, 258685, 332595, 367605, 465633, 598671, 776055, 997785, 1102815, 1396899, 2328165, 2993355, 4190697, 6984495, 20953485]

約数ペア:

[(1, 20953485), (3, 6984495), (5, 4190697), (7, 2993355), (9, 2328165), (15, 1396899), (19, 1102815), (21, 997785), (27, 776055), (35, 598671), (45, 465633), (57, 367605), (63, 332595), (81, 258685), (95, 220563), (105, 199557), (133, 157545), (135, 155211), (171, 122535), (189, 110865), (285, 73521), (315, 66519), (389, 53865), (399, 52515), (405, 51737), (513, 40845), (567, 36955), (665, 31509), (855, 24507), (945, 22173), (1167, 17955), (1197, 17505), (1539, 13615), (1945, 10773), (1995, 10503), (2565, 8169), (2723, 7695), (2835, 7391), (3501, 5985), (3591, 5835)]