21061560

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{587}}^1$

素因数の和:637

約数の個数: 128

約数和(自身を含む): 71124480

約数和(自身を除く): 50062920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 23, 24, 26, 30, 39, 40, 46, 52, 60, 65, 69, 78, 92, 104, 115, 120, 130, 138, 156, 184, 195, 230, 260, 276, 299, 312, 345, 390, 460, 520, 552, 587, 598, 690, 780, 897, 920, 1174, 1196, 1380, 1495, 1560, 1761, 1794, 2348, 2392, 2760, 2935, 2990, 3522, 3588, 4485, 4696, 5870, 5980, 7044, 7176, 7631, 8805, 8970, 11740, 11960, 13501, 14088, 15262, 17610, 17940, 22893, 23480, 27002, 30524, 35220, 35880, 38155, 40503, 45786, 54004, 61048, 67505, 70440, 76310, 81006, 91572, 108008, 114465, 135010, 152620, 162012, 175513, 183144, 202515, 228930, 270020, 305240, 324024, 351026, 405030, 457860, 526539, 540040, 702052, 810060, 877565, 915720, 1053078, 1404104, 1620120, 1755130, 2106156, 2632695, 3510260, 4212312, 5265390, 7020520, 10530780, 21061560]

約数ペア:

[(1, 21061560), (2, 10530780), (3, 7020520), (4, 5265390), (5, 4212312), (6, 3510260), (8, 2632695), (10, 2106156), (12, 1755130), (13, 1620120), (15, 1404104), (20, 1053078), (23, 915720), (24, 877565), (26, 810060), (30, 702052), (39, 540040), (40, 526539), (46, 457860), (52, 405030), (60, 351026), (65, 324024), (69, 305240), (78, 270020), (92, 228930), (104, 202515), (115, 183144), (120, 175513), (130, 162012), (138, 152620), (156, 135010), (184, 114465), (195, 108008), (230, 91572), (260, 81006), (276, 76310), (299, 70440), (312, 67505), (345, 61048), (390, 54004), (460, 45786), (520, 40503), (552, 38155), (587, 35880), (598, 35220), (690, 30524), (780, 27002), (897, 23480), (920, 22893), (1174, 17940), (1196, 17610), (1380, 15262), (1495, 14088), (1560, 13501), (1761, 11960), (1794, 11740), (2348, 8970), (2392, 8805), (2760, 7631), (2935, 7176), (2990, 7044), (3522, 5980), (3588, 5870), (4485, 4696)]