1281449728

素因数分解:

$2^8\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{12421}}^1$

素因数の和:12481

約数の個数: 72

約数和(自身を含む): 2843743616

約数和(自身を除く): 1562293888

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 32, 52, 62, 64, 104, 124, 128, 208, 248, 256, 403, 416, 496, 806, 832, 992, 1612, 1664, 1984, 3224, 3328, 3968, 6448, 7936, 12421, 12896, 24842, 25792, 49684, 51584, 99368, 103168, 161473, 198736, 322946, 385051, 397472, 645892, 770102, 794944, 1291784, 1540204, 1589888, 2583568, 3080408, 3179776, 5005663, 5167136, 6160816, 10011326, 10334272, 12321632, 20022652, 20668544, 24643264, 40045304, 41337088, 49286528, 80090608, 98573056, 160181216, 320362432, 640724864, 1281449728]

約数ペア:

[(1, 1281449728), (2, 640724864), (4, 320362432), (8, 160181216), (13, 98573056), (16, 80090608), (26, 49286528), (31, 41337088), (32, 40045304), (52, 24643264), (62, 20668544), (64, 20022652), (104, 12321632), (124, 10334272), (128, 10011326), (208, 6160816), (248, 5167136), (256, 5005663), (403, 3179776), (416, 3080408), (496, 2583568), (806, 1589888), (832, 1540204), (992, 1291784), (1612, 794944), (1664, 770102), (1984, 645892), (3224, 397472), (3328, 385051), (3968, 322946), (6448, 198736), (7936, 161473), (12421, 103168), (12896, 99368), (24842, 51584), (25792, 49684)]