257512920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{306563}}^1$

素因数の和:306584

約数の個数: 64

約数和(自身を含む): 882904320

約数和(自身を除く): 625391400

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 306563, 613126, 919689, 1226252, 1532815, 1839378, 2145941, 2452504, 3065630, 3678756, 4291882, 4598445, 6131260, 6437823, 7357512, 8583764, 9196890, 10729705, 12262520, 12875646, 17167528, 18393780, 21459410, 25751292, 32189115, 36787560, 42918820, 51502584, 64378230, 85837640, 128756460, 257512920]

約数ペア:

[(1, 257512920), (2, 128756460), (3, 85837640), (4, 64378230), (5, 51502584), (6, 42918820), (7, 36787560), (8, 32189115), (10, 25751292), (12, 21459410), (14, 18393780), (15, 17167528), (20, 12875646), (21, 12262520), (24, 10729705), (28, 9196890), (30, 8583764), (35, 7357512), (40, 6437823), (42, 6131260), (56, 4598445), (60, 4291882), (70, 3678756), (84, 3065630), (105, 2452504), (120, 2145941), (140, 1839378), (168, 1532815), (210, 1226252), (280, 919689), (420, 613126), (840, 306563)]