21519680

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{739}}^1$

素因数の和:776

約数の個数: 112

約数和(自身を含む): 63154560

約数和(自身を除く): 41634880

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 64, 65, 70, 80, 91, 104, 112, 130, 140, 160, 182, 208, 224, 260, 280, 320, 364, 416, 448, 455, 520, 560, 728, 739, 832, 910, 1040, 1120, 1456, 1478, 1820, 2080, 2240, 2912, 2956, 3640, 3695, 4160, 5173, 5824, 5912, 7280, 7390, 9607, 10346, 11824, 14560, 14780, 19214, 20692, 23648, 25865, 29120, 29560, 38428, 41384, 47296, 48035, 51730, 59120, 67249, 76856, 82768, 96070, 103460, 118240, 134498, 153712, 165536, 192140, 206920, 236480, 268996, 307424, 331072, 336245, 384280, 413840, 537992, 614848, 672490, 768560, 827680, 1075984, 1344980, 1537120, 1655360, 2151968, 2689960, 3074240, 4303936, 5379920, 10759840, 21519680]

約数ペア:

[(1, 21519680), (2, 10759840), (4, 5379920), (5, 4303936), (7, 3074240), (8, 2689960), (10, 2151968), (13, 1655360), (14, 1537120), (16, 1344980), (20, 1075984), (26, 827680), (28, 768560), (32, 672490), (35, 614848), (40, 537992), (52, 413840), (56, 384280), (64, 336245), (65, 331072), (70, 307424), (80, 268996), (91, 236480), (104, 206920), (112, 192140), (130, 165536), (140, 153712), (160, 134498), (182, 118240), (208, 103460), (224, 96070), (260, 82768), (280, 76856), (320, 67249), (364, 59120), (416, 51730), (448, 48035), (455, 47296), (520, 41384), (560, 38428), (728, 29560), (739, 29120), (832, 25865), (910, 23648), (1040, 20692), (1120, 19214), (1456, 14780), (1478, 14560), (1820, 11824), (2080, 10346), (2240, 9607), (2912, 7390), (2956, 7280), (3640, 5912), (3695, 5824), (4160, 5173)]