1390545920

素因数分解:

$2^{10}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8761}}^1$

素因数の和:8817

約数の個数: 88

約数和(自身を含む): 3443676288

約数和(自身を除く): 2053130368

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 512, 620, 640, 992, 1024, 1240, 1280, 1984, 2480, 2560, 3968, 4960, 5120, 7936, 8761, 9920, 15872, 17522, 19840, 31744, 35044, 39680, 43805, 70088, 79360, 87610, 140176, 158720, 175220, 271591, 280352, 350440, 543182, 560704, 700880, 1086364, 1121408, 1357955, 1401760, 2172728, 2242816, 2715910, 2803520, 4345456, 4485632, 5431820, 5607040, 8690912, 8971264, 10863640, 11214080, 17381824, 21727280, 22428160, 34763648, 43454560, 44856320, 69527296, 86909120, 139054592, 173818240, 278109184, 347636480, 695272960, 1390545920]

約数ペア:

[(1, 1390545920), (2, 695272960), (4, 347636480), (5, 278109184), (8, 173818240), (10, 139054592), (16, 86909120), (20, 69527296), (31, 44856320), (32, 43454560), (40, 34763648), (62, 22428160), (64, 21727280), (80, 17381824), (124, 11214080), (128, 10863640), (155, 8971264), (160, 8690912), (248, 5607040), (256, 5431820), (310, 4485632), (320, 4345456), (496, 2803520), (512, 2715910), (620, 2242816), (640, 2172728), (992, 1401760), (1024, 1357955), (1240, 1121408), (1280, 1086364), (1984, 700880), (2480, 560704), (2560, 543182), (3968, 350440), (4960, 280352), (5120, 271591), (7936, 175220), (8761, 158720), (9920, 140176), (15872, 87610), (17522, 79360), (19840, 70088), (31744, 43805), (35044, 39680)]