81613980

素因数分解:

$2^2\times 3^5\times 5^1\times 7^1\times {\mathrm{2399}}^1$

素因数の和:2430

約数の個数: 144

約数和(自身を含む): 293529600

約数和(自身を除く): 211915620

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 81, 84, 90, 105, 108, 126, 135, 140, 162, 180, 189, 210, 243, 252, 270, 315, 324, 378, 405, 420, 486, 540, 567, 630, 756, 810, 945, 972, 1134, 1215, 1260, 1620, 1701, 1890, 2268, 2399, 2430, 2835, 3402, 3780, 4798, 4860, 5670, 6804, 7197, 8505, 9596, 11340, 11995, 14394, 16793, 17010, 21591, 23990, 28788, 33586, 34020, 35985, 43182, 47980, 50379, 64773, 67172, 71970, 83965, 86364, 100758, 107955, 129546, 143940, 151137, 167930, 194319, 201516, 215910, 251895, 259092, 302274, 323865, 335860, 388638, 431820, 453411, 503790, 582957, 604548, 647730, 755685, 777276, 906822, 971595, 1007580, 1165914, 1295460, 1360233, 1511370, 1813644, 1943190, 2267055, 2331828, 2720466, 2914785, 3022740, 3886380, 4080699, 4534110, 5440932, 5829570, 6801165, 8161398, 9068220, 11659140, 13602330, 16322796, 20403495, 27204660, 40806990, 81613980]

約数ペア:

[(1, 81613980), (2, 40806990), (3, 27204660), (4, 20403495), (5, 16322796), (6, 13602330), (7, 11659140), (9, 9068220), (10, 8161398), (12, 6801165), (14, 5829570), (15, 5440932), (18, 4534110), (20, 4080699), (21, 3886380), (27, 3022740), (28, 2914785), (30, 2720466), (35, 2331828), (36, 2267055), (42, 1943190), (45, 1813644), (54, 1511370), (60, 1360233), (63, 1295460), (70, 1165914), (81, 1007580), (84, 971595), (90, 906822), (105, 777276), (108, 755685), (126, 647730), (135, 604548), (140, 582957), (162, 503790), (180, 453411), (189, 431820), (210, 388638), (243, 335860), (252, 323865), (270, 302274), (315, 259092), (324, 251895), (378, 215910), (405, 201516), (420, 194319), (486, 167930), (540, 151137), (567, 143940), (630, 129546), (756, 107955), (810, 100758), (945, 86364), (972, 83965), (1134, 71970), (1215, 67172), (1260, 64773), (1620, 50379), (1701, 47980), (1890, 43182), (2268, 35985), (2399, 34020), (2430, 33586), (2835, 28788), (3402, 23990), (3780, 21591), (4798, 17010), (4860, 16793), (5670, 14394), (6804, 11995), (7197, 11340), (8505, 9596)]