638820720

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{28621}}^1$

素因数の和:28671

約数の個数: 120

約数和(自身を含む): 2214655872

約数和(自身を除く): 1575835152

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 31, 36, 40, 45, 48, 60, 62, 72, 80, 90, 93, 120, 124, 144, 155, 180, 186, 240, 248, 279, 310, 360, 372, 465, 496, 558, 620, 720, 744, 930, 1116, 1240, 1395, 1488, 1860, 2232, 2480, 2790, 3720, 4464, 5580, 7440, 11160, 22320, 28621, 57242, 85863, 114484, 143105, 171726, 228968, 257589, 286210, 343452, 429315, 457936, 515178, 572420, 686904, 858630, 887251, 1030356, 1144840, 1287945, 1373808, 1717260, 1774502, 2060712, 2289680, 2575890, 2661753, 3434520, 3549004, 4121424, 4436255, 5151780, 5323506, 6869040, 7098008, 7985259, 8872510, 10303560, 10647012, 13308765, 14196016, 15970518, 17745020, 20607120, 21294024, 26617530, 31941036, 35490040, 39926295, 42588048, 53235060, 63882072, 70980080, 79852590, 106470120, 127764144, 159705180, 212940240, 319410360, 638820720]

約数ペア:

[(1, 638820720), (2, 319410360), (3, 212940240), (4, 159705180), (5, 127764144), (6, 106470120), (8, 79852590), (9, 70980080), (10, 63882072), (12, 53235060), (15, 42588048), (16, 39926295), (18, 35490040), (20, 31941036), (24, 26617530), (30, 21294024), (31, 20607120), (36, 17745020), (40, 15970518), (45, 14196016), (48, 13308765), (60, 10647012), (62, 10303560), (72, 8872510), (80, 7985259), (90, 7098008), (93, 6869040), (120, 5323506), (124, 5151780), (144, 4436255), (155, 4121424), (180, 3549004), (186, 3434520), (240, 2661753), (248, 2575890), (279, 2289680), (310, 2060712), (360, 1774502), (372, 1717260), (465, 1373808), (496, 1287945), (558, 1144840), (620, 1030356), (720, 887251), (744, 858630), (930, 686904), (1116, 572420), (1240, 515178), (1395, 457936), (1488, 429315), (1860, 343452), (2232, 286210), (2480, 257589), (2790, 228968), (3720, 171726), (4464, 143105), (5580, 114484), (7440, 85863), (11160, 57242), (22320, 28621)]