21215844

素因数分解:

$2^2\times 3^5\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1$

素因数の和:128

約数の個数: 144

約数和(自身を含む): 63353472

約数和(自身を除く): 42137628

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 23, 26, 27, 36, 39, 46, 52, 54, 69, 73, 78, 81, 92, 108, 117, 138, 146, 156, 162, 207, 219, 234, 243, 276, 292, 299, 324, 351, 414, 438, 468, 486, 598, 621, 657, 702, 828, 876, 897, 949, 972, 1053, 1196, 1242, 1314, 1404, 1679, 1794, 1863, 1898, 1971, 2106, 2484, 2628, 2691, 2847, 3159, 3358, 3588, 3726, 3796, 3942, 4212, 5037, 5382, 5589, 5694, 5913, 6318, 6716, 7452, 7884, 8073, 8541, 10074, 10764, 11178, 11388, 11826, 12636, 15111, 16146, 17082, 17739, 20148, 21827, 22356, 23652, 24219, 25623, 30222, 32292, 34164, 35478, 43654, 45333, 48438, 51246, 60444, 65481, 70956, 72657, 76869, 87308, 90666, 96876, 102492, 130962, 135999, 145314, 153738, 181332, 196443, 230607, 261924, 271998, 290628, 307476, 392886, 407997, 461214, 543996, 589329, 785772, 815994, 922428, 1178658, 1631988, 1767987, 2357316, 3535974, 5303961, 7071948, 10607922, 21215844]

約数ペア:

[(1, 21215844), (2, 10607922), (3, 7071948), (4, 5303961), (6, 3535974), (9, 2357316), (12, 1767987), (13, 1631988), (18, 1178658), (23, 922428), (26, 815994), (27, 785772), (36, 589329), (39, 543996), (46, 461214), (52, 407997), (54, 392886), (69, 307476), (73, 290628), (78, 271998), (81, 261924), (92, 230607), (108, 196443), (117, 181332), (138, 153738), (146, 145314), (156, 135999), (162, 130962), (207, 102492), (219, 96876), (234, 90666), (243, 87308), (276, 76869), (292, 72657), (299, 70956), (324, 65481), (351, 60444), (414, 51246), (438, 48438), (468, 45333), (486, 43654), (598, 35478), (621, 34164), (657, 32292), (702, 30222), (828, 25623), (876, 24219), (897, 23652), (949, 22356), (972, 21827), (1053, 20148), (1196, 17739), (1242, 17082), (1314, 16146), (1404, 15111), (1679, 12636), (1794, 11826), (1863, 11388), (1898, 11178), (1971, 10764), (2106, 10074), (2484, 8541), (2628, 8073), (2691, 7884), (2847, 7452), (3159, 6716), (3358, 6318), (3588, 5913), (3726, 5694), (3796, 5589), (3942, 5382), (4212, 5037)]