21294208

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{191}}^1$

素因数の和:285

約数の個数: 64

約数和(自身を含む): 46609920

約数和(自身を除く): 25315712

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 67, 104, 128, 134, 191, 208, 268, 382, 416, 536, 764, 832, 871, 1072, 1528, 1664, 1742, 2144, 2483, 3056, 3484, 4288, 4966, 6112, 6968, 8576, 9932, 12224, 12797, 13936, 19864, 24448, 25594, 27872, 39728, 51188, 55744, 79456, 102376, 111488, 158912, 166361, 204752, 317824, 332722, 409504, 665444, 819008, 1330888, 1638016, 2661776, 5323552, 10647104, 21294208]

約数ペア:

[(1, 21294208), (2, 10647104), (4, 5323552), (8, 2661776), (13, 1638016), (16, 1330888), (26, 819008), (32, 665444), (52, 409504), (64, 332722), (67, 317824), (104, 204752), (128, 166361), (134, 158912), (191, 111488), (208, 102376), (268, 79456), (382, 55744), (416, 51188), (536, 39728), (764, 27872), (832, 25594), (871, 24448), (1072, 19864), (1528, 13936), (1664, 12797), (1742, 12224), (2144, 9932), (2483, 8576), (3056, 6968), (3484, 6112), (4288, 4966)]