258156920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{921989}}^1$

素因数の和:922007

約数の個数: 32

約数和(自身を含む): 663832800

約数和(自身を除く): 405675880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 921989, 1843978, 3687956, 4609945, 6453923, 7375912, 9219890, 12907846, 18439780, 25815692, 32269615, 36879560, 51631384, 64539230, 129078460, 258156920]

約数ペア:

[(1, 258156920), (2, 129078460), (4, 64539230), (5, 51631384), (7, 36879560), (8, 32269615), (10, 25815692), (14, 18439780), (20, 12907846), (28, 9219890), (35, 7375912), (40, 6453923), (56, 4609945), (70, 3687956), (140, 1843978), (280, 921989)]