21381472

素因数分解:

$2^5\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1801}}^1$

素因数の和:1871

約数の個数: 48

約数和(自身を含む): 49043232

約数和(自身を除く): 27661760

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 53, 56, 106, 112, 212, 224, 371, 424, 742, 848, 1484, 1696, 1801, 2968, 3602, 5936, 7204, 11872, 12607, 14408, 25214, 28816, 50428, 57632, 95453, 100856, 190906, 201712, 381812, 403424, 668171, 763624, 1336342, 1527248, 2672684, 3054496, 5345368, 10690736, 21381472]

約数ペア:

[(1, 21381472), (2, 10690736), (4, 5345368), (7, 3054496), (8, 2672684), (14, 1527248), (16, 1336342), (28, 763624), (32, 668171), (53, 403424), (56, 381812), (106, 201712), (112, 190906), (212, 100856), (224, 95453), (371, 57632), (424, 50428), (742, 28816), (848, 25214), (1484, 14408), (1696, 12607), (1801, 11872), (2968, 7204), (3602, 5936)]