2781459100

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{25309}}^1$

素因数の和:25487

約数の個数: 72

約数和(自身を含む): 6942229280

約数和(自身を除く): 4160770180

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 100, 140, 157, 175, 314, 350, 628, 700, 785, 1099, 1570, 2198, 3140, 3925, 4396, 5495, 7850, 10990, 15700, 21980, 25309, 27475, 50618, 54950, 101236, 109900, 126545, 177163, 253090, 354326, 506180, 632725, 708652, 885815, 1265450, 1771630, 2530900, 3543260, 3973513, 4429075, 7947026, 8858150, 15894052, 17716300, 19867565, 27814591, 39735130, 55629182, 79470260, 99337825, 111258364, 139072955, 198675650, 278145910, 397351300, 556291820, 695364775, 1390729550, 2781459100]

約数ペア:

[(1, 2781459100), (2, 1390729550), (4, 695364775), (5, 556291820), (7, 397351300), (10, 278145910), (14, 198675650), (20, 139072955), (25, 111258364), (28, 99337825), (35, 79470260), (50, 55629182), (70, 39735130), (100, 27814591), (140, 19867565), (157, 17716300), (175, 15894052), (314, 8858150), (350, 7947026), (628, 4429075), (700, 3973513), (785, 3543260), (1099, 2530900), (1570, 1771630), (2198, 1265450), (3140, 885815), (3925, 708652), (4396, 632725), (5495, 506180), (7850, 354326), (10990, 253090), (15700, 177163), (21980, 126545), (25309, 109900), (27475, 101236), (50618, 54950)]