21247.000000

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1$

素因数の和:200

約数の個数: 48

約数和(自身を含む): 545664

約数和(自身を除く): 356748

約数列:

[1, 2, 3, 4, 6, 7, 12, 13, 14, 21, 26, 28, 39, 42, 52, 78, 84, 91, 156, 173, 182, 273, 346, 364, 519, 546, 692, 1038, 1092, 1211, 2076, 2249, 2422, 3633, 4498, 4844, 6747, 7266, 8996, 13494, 14532, 15743, 26988, 31486, 47229, 62972, 94458, 188916]

約数ペア:

[(1, 188916), (2, 94458), (3, 62972), (4, 47229), (6, 31486), (7, 26988), (12, 15743), (13, 14532), (14, 13494), (21, 8996), (26, 7266), (28, 6747), (39, 4844), (42, 4498), (52, 3633), (78, 2422), (84, 2249), (91, 2076), (156, 1211), (173, 1092), (182, 1038), (273, 692), (346, 546), (364, 519)]