256756920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{305663}}^1$

素因数の和:305684

約数の個数: 64

約数和(自身を含む): 880312320

約数和(自身を除く): 623555400

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, 305663, 611326, 916989, 1222652, 1528315, 1833978, 2139641, 2445304, 3056630, 3667956, 4279282, 4584945, 6113260, 6418923, 7335912, 8558564, 9169890, 10698205, 12226520, 12837846, 17117128, 18339780, 21396410, 25675692, 32094615, 36679560, 42792820, 51351384, 64189230, 85585640, 128378460, 256756920]

約数ペア:

[(1, 256756920), (2, 128378460), (3, 85585640), (4, 64189230), (5, 51351384), (6, 42792820), (7, 36679560), (8, 32094615), (10, 25675692), (12, 21396410), (14, 18339780), (15, 17117128), (20, 12837846), (21, 12226520), (24, 10698205), (28, 9169890), (30, 8558564), (35, 7335912), (40, 6418923), (42, 6113260), (56, 4584945), (60, 4279282), (70, 3667956), (84, 3056630), (105, 2445304), (120, 2139641), (140, 1833978), (168, 1528315), (210, 1222652), (280, 916989), (420, 611326), (840, 305663)]