21706880

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2609}}^1$

素因数の和:2641

約数の個数: 64

約数和(自身を含む): 55906200

約数和(自身を除く): 34199320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 2609, 4160, 5218, 8320, 10436, 13045, 20872, 26090, 33917, 41744, 52180, 67834, 83488, 104360, 135668, 166976, 169585, 208720, 271336, 333952, 339170, 417440, 542672, 678340, 834880, 1085344, 1356680, 1669760, 2170688, 2713360, 4341376, 5426720, 10853440, 21706880]

約数ペア:

[(1, 21706880), (2, 10853440), (4, 5426720), (5, 4341376), (8, 2713360), (10, 2170688), (13, 1669760), (16, 1356680), (20, 1085344), (26, 834880), (32, 678340), (40, 542672), (52, 417440), (64, 339170), (65, 333952), (80, 271336), (104, 208720), (128, 169585), (130, 166976), (160, 135668), (208, 104360), (260, 83488), (320, 67834), (416, 52180), (520, 41744), (640, 33917), (832, 26090), (1040, 20872), (1664, 13045), (2080, 10436), (2609, 8320), (4160, 5218)]