21457620

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:182

約数の個数: 144

約数和(自身を含む): 69818112

約数和(自身を除く): 48360492

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 45, 46, 60, 69, 71, 73, 90, 92, 115, 138, 142, 146, 180, 207, 213, 219, 230, 276, 284, 292, 345, 355, 365, 414, 426, 438, 460, 639, 657, 690, 710, 730, 828, 852, 876, 1035, 1065, 1095, 1278, 1314, 1380, 1420, 1460, 1633, 1679, 2070, 2130, 2190, 2556, 2628, 3195, 3266, 3285, 3358, 4140, 4260, 4380, 4899, 5037, 5183, 6390, 6532, 6570, 6716, 8165, 8395, 9798, 10074, 10366, 12780, 13140, 14697, 15111, 15549, 16330, 16790, 19596, 20148, 20732, 24495, 25185, 25915, 29394, 30222, 31098, 32660, 33580, 46647, 48990, 50370, 51830, 58788, 60444, 62196, 73485, 75555, 77745, 93294, 97980, 100740, 103660, 119209, 146970, 151110, 155490, 186588, 233235, 238418, 293940, 302220, 310980, 357627, 466470, 476836, 596045, 715254, 932940, 1072881, 1192090, 1430508, 1788135, 2145762, 2384180, 3576270, 4291524, 5364405, 7152540, 10728810, 21457620]

約数ペア:

[(1, 21457620), (2, 10728810), (3, 7152540), (4, 5364405), (5, 4291524), (6, 3576270), (9, 2384180), (10, 2145762), (12, 1788135), (15, 1430508), (18, 1192090), (20, 1072881), (23, 932940), (30, 715254), (36, 596045), (45, 476836), (46, 466470), (60, 357627), (69, 310980), (71, 302220), (73, 293940), (90, 238418), (92, 233235), (115, 186588), (138, 155490), (142, 151110), (146, 146970), (180, 119209), (207, 103660), (213, 100740), (219, 97980), (230, 93294), (276, 77745), (284, 75555), (292, 73485), (345, 62196), (355, 60444), (365, 58788), (414, 51830), (426, 50370), (438, 48990), (460, 46647), (639, 33580), (657, 32660), (690, 31098), (710, 30222), (730, 29394), (828, 25915), (852, 25185), (876, 24495), (1035, 20732), (1065, 20148), (1095, 19596), (1278, 16790), (1314, 16330), (1380, 15549), (1420, 15111), (1460, 14697), (1633, 13140), (1679, 12780), (2070, 10366), (2130, 10074), (2190, 9798), (2556, 8395), (2628, 8165), (3195, 6716), (3266, 6570), (3285, 6532), (3358, 6390), (4140, 5183), (4260, 5037), (4380, 4899)]