399411440

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{161053}}^1$

素因数の和:161097

約数の個数: 40

約数和(自身を含む): 958593408

約数和(自身を除く): 559181968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 161053, 322106, 644212, 805265, 1288424, 1610530, 2576848, 3221060, 4992643, 6442120, 9985286, 12884240, 19970572, 24963215, 39941144, 49926430, 79882288, 99852860, 199705720, 399411440]

約数ペア:

[(1, 399411440), (2, 199705720), (4, 99852860), (5, 79882288), (8, 49926430), (10, 39941144), (16, 24963215), (20, 19970572), (31, 12884240), (40, 9985286), (62, 6442120), (80, 4992643), (124, 3221060), (155, 2576848), (248, 1610530), (310, 1288424), (496, 805265), (620, 644212), (1240, 322106), (2480, 161053)]