638204560

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{509}}^1\times {\mathrm{2239}}^1$

素因数の和:2768

約数の個数: 80

約数和(自身を含む): 1699891200

約数和(自身を除く): 1061686640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 509, 560, 1018, 2036, 2239, 2545, 3563, 4072, 4478, 5090, 7126, 8144, 8956, 10180, 11195, 14252, 15673, 17815, 17912, 20360, 22390, 28504, 31346, 35630, 35824, 40720, 44780, 57008, 62692, 71260, 78365, 89560, 125384, 142520, 156730, 179120, 250768, 285040, 313460, 626920, 1139651, 1253840, 2279302, 4558604, 5698255, 7977557, 9117208, 11396510, 15955114, 18234416, 22793020, 31910228, 39887785, 45586040, 63820456, 79775570, 91172080, 127640912, 159551140, 319102280, 638204560]

約数ペア:

[(1, 638204560), (2, 319102280), (4, 159551140), (5, 127640912), (7, 91172080), (8, 79775570), (10, 63820456), (14, 45586040), (16, 39887785), (20, 31910228), (28, 22793020), (35, 18234416), (40, 15955114), (56, 11396510), (70, 9117208), (80, 7977557), (112, 5698255), (140, 4558604), (280, 2279302), (509, 1253840), (560, 1139651), (1018, 626920), (2036, 313460), (2239, 285040), (2545, 250768), (3563, 179120), (4072, 156730), (4478, 142520), (5090, 125384), (7126, 89560), (8144, 78365), (8956, 71260), (10180, 62692), (11195, 57008), (14252, 44780), (15673, 40720), (17815, 35824), (17912, 35630), (20360, 31346), (22390, 28504)]