400334920

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{1931}}^1$

素因数の和:2086

約数の個数: 64

約数和(自身を含む): 926432640

約数和(自身を除く): 526097720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 73, 142, 146, 284, 292, 355, 365, 568, 584, 710, 730, 1420, 1460, 1931, 2840, 2920, 3862, 5183, 7724, 9655, 10366, 15448, 19310, 20732, 25915, 38620, 41464, 51830, 77240, 103660, 137101, 140963, 207320, 274202, 281926, 548404, 563852, 685505, 704815, 1096808, 1127704, 1371010, 1409630, 2742020, 2819260, 5484040, 5638520, 10008373, 20016746, 40033492, 50041865, 80066984, 100083730, 200167460, 400334920]

約数ペア:

[(1, 400334920), (2, 200167460), (4, 100083730), (5, 80066984), (8, 50041865), (10, 40033492), (20, 20016746), (40, 10008373), (71, 5638520), (73, 5484040), (142, 2819260), (146, 2742020), (284, 1409630), (292, 1371010), (355, 1127704), (365, 1096808), (568, 704815), (584, 685505), (710, 563852), (730, 548404), (1420, 281926), (1460, 274202), (1931, 207320), (2840, 140963), (2920, 137101), (3862, 103660), (5183, 77240), (7724, 51830), (9655, 41464), (10366, 38620), (15448, 25915), (19310, 20732)]