21217664

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{311}}^1$

素因数の和:379

約数の個数: 64

約数和(自身を含む): 46781280

約数和(自身を除く): 25563616

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 41, 52, 64, 82, 104, 128, 164, 208, 311, 328, 416, 533, 622, 656, 832, 1066, 1244, 1312, 1664, 2132, 2488, 2624, 4043, 4264, 4976, 5248, 8086, 8528, 9952, 12751, 16172, 17056, 19904, 25502, 32344, 34112, 39808, 51004, 64688, 68224, 102008, 129376, 165763, 204016, 258752, 331526, 408032, 517504, 663052, 816064, 1326104, 1632128, 2652208, 5304416, 10608832, 21217664]

約数ペア:

[(1, 21217664), (2, 10608832), (4, 5304416), (8, 2652208), (13, 1632128), (16, 1326104), (26, 816064), (32, 663052), (41, 517504), (52, 408032), (64, 331526), (82, 258752), (104, 204016), (128, 165763), (164, 129376), (208, 102008), (311, 68224), (328, 64688), (416, 51004), (533, 39808), (622, 34112), (656, 32344), (832, 25502), (1066, 19904), (1244, 17056), (1312, 16172), (1664, 12751), (2132, 9952), (2488, 8528), (2624, 8086), (4043, 5248), (4264, 4976)]