21641580

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:158

約数の個数: 144

約数和(自身を含む): 70141344

約数和(自身を除く): 48499764

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 61, 73, 81, 90, 108, 122, 135, 146, 162, 180, 183, 219, 243, 244, 270, 292, 305, 324, 365, 366, 405, 438, 486, 540, 549, 610, 657, 730, 732, 810, 876, 915, 972, 1095, 1098, 1215, 1220, 1314, 1460, 1620, 1647, 1830, 1971, 2190, 2196, 2430, 2628, 2745, 3285, 3294, 3660, 3942, 4380, 4453, 4860, 4941, 5490, 5913, 6570, 6588, 7884, 8235, 8906, 9855, 9882, 10980, 11826, 13140, 13359, 14823, 16470, 17739, 17812, 19710, 19764, 22265, 23652, 24705, 26718, 29565, 29646, 32940, 35478, 39420, 40077, 44530, 49410, 53436, 59130, 59292, 66795, 70956, 74115, 80154, 88695, 89060, 98820, 118260, 120231, 133590, 148230, 160308, 177390, 200385, 240462, 267180, 296460, 354780, 360693, 400770, 480924, 601155, 721386, 801540, 1082079, 1202310, 1442772, 1803465, 2164158, 2404620, 3606930, 4328316, 5410395, 7213860, 10820790, 21641580]

約数ペア:

[(1, 21641580), (2, 10820790), (3, 7213860), (4, 5410395), (5, 4328316), (6, 3606930), (9, 2404620), (10, 2164158), (12, 1803465), (15, 1442772), (18, 1202310), (20, 1082079), (27, 801540), (30, 721386), (36, 601155), (45, 480924), (54, 400770), (60, 360693), (61, 354780), (73, 296460), (81, 267180), (90, 240462), (108, 200385), (122, 177390), (135, 160308), (146, 148230), (162, 133590), (180, 120231), (183, 118260), (219, 98820), (243, 89060), (244, 88695), (270, 80154), (292, 74115), (305, 70956), (324, 66795), (365, 59292), (366, 59130), (405, 53436), (438, 49410), (486, 44530), (540, 40077), (549, 39420), (610, 35478), (657, 32940), (730, 29646), (732, 29565), (810, 26718), (876, 24705), (915, 23652), (972, 22265), (1095, 19764), (1098, 19710), (1215, 17812), (1220, 17739), (1314, 16470), (1460, 14823), (1620, 13359), (1647, 13140), (1830, 11826), (1971, 10980), (2190, 9882), (2196, 9855), (2430, 8906), (2628, 8235), (2745, 7884), (3285, 6588), (3294, 6570), (3660, 5913), (3942, 5490), (4380, 4941), (4453, 4860)]