21263760

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{4219}}^1$

素因数の和:4245

約数の個数: 120

約数和(自身を含む): 81631680

約数和(自身を除く): 60367920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 105, 112, 120, 126, 140, 144, 168, 180, 210, 240, 252, 280, 315, 336, 360, 420, 504, 560, 630, 720, 840, 1008, 1260, 1680, 2520, 4219, 5040, 8438, 12657, 16876, 21095, 25314, 29533, 33752, 37971, 42190, 50628, 59066, 63285, 67504, 75942, 84380, 88599, 101256, 118132, 126570, 147665, 151884, 168760, 177198, 189855, 202512, 236264, 253140, 265797, 295330, 303768, 337520, 354396, 379710, 442995, 472528, 506280, 531594, 590660, 607536, 708792, 759420, 885990, 1012560, 1063188, 1181320, 1328985, 1417584, 1518840, 1771980, 2126376, 2362640, 2657970, 3037680, 3543960, 4252752, 5315940, 7087920, 10631880, 21263760]

約数ペア:

[(1, 21263760), (2, 10631880), (3, 7087920), (4, 5315940), (5, 4252752), (6, 3543960), (7, 3037680), (8, 2657970), (9, 2362640), (10, 2126376), (12, 1771980), (14, 1518840), (15, 1417584), (16, 1328985), (18, 1181320), (20, 1063188), (21, 1012560), (24, 885990), (28, 759420), (30, 708792), (35, 607536), (36, 590660), (40, 531594), (42, 506280), (45, 472528), (48, 442995), (56, 379710), (60, 354396), (63, 337520), (70, 303768), (72, 295330), (80, 265797), (84, 253140), (90, 236264), (105, 202512), (112, 189855), (120, 177198), (126, 168760), (140, 151884), (144, 147665), (168, 126570), (180, 118132), (210, 101256), (240, 88599), (252, 84380), (280, 75942), (315, 67504), (336, 63285), (360, 59066), (420, 50628), (504, 42190), (560, 37971), (630, 33752), (720, 29533), (840, 25314), (1008, 21095), (1260, 16876), (1680, 12657), (2520, 8438), (4219, 5040)]