400442840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{20143}}^1$

素因数の和:20232

約数の個数: 64

約数和(自身を含む): 1044264960

約数和(自身を除く): 643822120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1420, 1988, 2485, 2840, 3976, 4970, 9940, 19880, 20143, 40286, 80572, 100715, 141001, 161144, 201430, 282002, 402860, 564004, 705005, 805720, 1128008, 1410010, 1430153, 2820020, 2860306, 5640040, 5720612, 7150765, 10011071, 11441224, 14301530, 20022142, 28603060, 40044284, 50055355, 57206120, 80088568, 100110710, 200221420, 400442840]

約数ペア:

[(1, 400442840), (2, 200221420), (4, 100110710), (5, 80088568), (7, 57206120), (8, 50055355), (10, 40044284), (14, 28603060), (20, 20022142), (28, 14301530), (35, 11441224), (40, 10011071), (56, 7150765), (70, 5720612), (71, 5640040), (140, 2860306), (142, 2820020), (280, 1430153), (284, 1410010), (355, 1128008), (497, 805720), (568, 705005), (710, 564004), (994, 402860), (1420, 282002), (1988, 201430), (2485, 161144), (2840, 141001), (3976, 100715), (4970, 80572), (9940, 40286), (19880, 20143)]