256923240

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{305861}}^1$

素因数の和:305882

約数の個数: 64

約数和(自身を含む): 880882560

約数和(自身を除く): 623959320

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, 305861, 611722, 917583, 1223444, 1529305, 1835166, 2141027, 2446888, 3058610, 3670332, 4282054, 4587915, 6117220, 6423081, 7340664, 8564108, 9175830, 10705135, 12234440, 12846162, 17128216, 18351660, 21410270, 25692324, 32115405, 36703320, 42820540, 51384648, 64230810, 85641080, 128461620, 256923240]

約数ペア:

[(1, 256923240), (2, 128461620), (3, 85641080), (4, 64230810), (5, 51384648), (6, 42820540), (7, 36703320), (8, 32115405), (10, 25692324), (12, 21410270), (14, 18351660), (15, 17128216), (20, 12846162), (21, 12234440), (24, 10705135), (28, 9175830), (30, 8564108), (35, 7340664), (40, 6423081), (42, 6117220), (56, 4587915), (60, 4282054), (70, 3670332), (84, 3058610), (105, 2446888), (120, 2141027), (140, 1835166), (168, 1529305), (210, 1223444), (280, 917583), (420, 611722), (840, 305861)]