281204720

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{761}}^1$

素因数の和:954

約数の個数: 80

約数和(自身を含む): 680313600

約数和(自身を除く): 399108880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 149, 155, 248, 298, 310, 496, 596, 620, 745, 761, 1192, 1240, 1490, 1522, 2384, 2480, 2980, 3044, 3805, 4619, 5960, 6088, 7610, 9238, 11920, 12176, 15220, 18476, 23095, 23591, 30440, 36952, 46190, 47182, 60880, 73904, 92380, 94364, 113389, 117955, 184760, 188728, 226778, 235910, 369520, 377456, 453556, 471820, 566945, 907112, 943640, 1133890, 1814224, 1887280, 2267780, 3515059, 4535560, 7030118, 9071120, 14060236, 17575295, 28120472, 35150590, 56240944, 70301180, 140602360, 281204720]

約数ペア:

[(1, 281204720), (2, 140602360), (4, 70301180), (5, 56240944), (8, 35150590), (10, 28120472), (16, 17575295), (20, 14060236), (31, 9071120), (40, 7030118), (62, 4535560), (80, 3515059), (124, 2267780), (149, 1887280), (155, 1814224), (248, 1133890), (298, 943640), (310, 907112), (496, 566945), (596, 471820), (620, 453556), (745, 377456), (761, 369520), (1192, 235910), (1240, 226778), (1490, 188728), (1522, 184760), (2384, 117955), (2480, 113389), (2980, 94364), (3044, 92380), (3805, 73904), (4619, 60880), (5960, 47182), (6088, 46190), (7610, 36952), (9238, 30440), (11920, 23591), (12176, 23095), (15220, 18476)]