256516988

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{151}}^1\times {\mathrm{359}}^1$

素因数の和:547

約数の個数: 72

約数和(自身を含む): 560770560

約数和(自身を除く): 304253572

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 151, 169, 182, 302, 338, 359, 364, 604, 676, 718, 1057, 1183, 1436, 1963, 2114, 2366, 2513, 3926, 4228, 4667, 4732, 5026, 7852, 9334, 10052, 13741, 18668, 25519, 27482, 32669, 51038, 54209, 54964, 60671, 65338, 102076, 108418, 121342, 130676, 178633, 216836, 242684, 357266, 379463, 424697, 704717, 714532, 758926, 849394, 1409434, 1517852, 1698788, 2818868, 4933019, 9161321, 9866038, 18322642, 19732076, 36645284, 64129247, 128258494, 256516988]

約数ペア:

[(1, 256516988), (2, 128258494), (4, 64129247), (7, 36645284), (13, 19732076), (14, 18322642), (26, 9866038), (28, 9161321), (52, 4933019), (91, 2818868), (151, 1698788), (169, 1517852), (182, 1409434), (302, 849394), (338, 758926), (359, 714532), (364, 704717), (604, 424697), (676, 379463), (718, 357266), (1057, 242684), (1183, 216836), (1436, 178633), (1963, 130676), (2114, 121342), (2366, 108418), (2513, 102076), (3926, 65338), (4228, 60671), (4667, 54964), (4732, 54209), (5026, 51038), (7852, 32669), (9334, 27482), (10052, 25519), (13741, 18668)]