400431640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{9109}}^1$

素因数の和:9284

約数の個数: 64

約数和(自身を含む): 1036353600

約数和(自身を除く): 635921960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 157, 280, 314, 628, 785, 1099, 1256, 1570, 2198, 3140, 4396, 5495, 6280, 8792, 9109, 10990, 18218, 21980, 36436, 43960, 45545, 63763, 72872, 91090, 127526, 182180, 255052, 318815, 364360, 510104, 637630, 1275260, 1430113, 2550520, 2860226, 5720452, 7150565, 10010791, 11440904, 14301130, 20021582, 28602260, 40043164, 50053955, 57204520, 80086328, 100107910, 200215820, 400431640]

約数ペア:

[(1, 400431640), (2, 200215820), (4, 100107910), (5, 80086328), (7, 57204520), (8, 50053955), (10, 40043164), (14, 28602260), (20, 20021582), (28, 14301130), (35, 11440904), (40, 10010791), (56, 7150565), (70, 5720452), (140, 2860226), (157, 2550520), (280, 1430113), (314, 1275260), (628, 637630), (785, 510104), (1099, 364360), (1256, 318815), (1570, 255052), (2198, 182180), (3140, 127526), (4396, 91090), (5495, 72872), (6280, 63763), (8792, 45545), (9109, 43960), (10990, 36436), (18218, 21980)]