20871968

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{383}}^1$

素因数の和:537

約数の個数: 48

約数和(自身を含む): 44706816

約数和(自身を除く): 23834848

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 131, 208, 262, 383, 416, 524, 766, 1048, 1532, 1703, 2096, 3064, 3406, 4192, 4979, 6128, 6812, 9958, 12256, 13624, 19916, 27248, 39832, 50173, 54496, 79664, 100346, 159328, 200692, 401384, 652249, 802768, 1304498, 1605536, 2608996, 5217992, 10435984, 20871968]

約数ペア:

[(1, 20871968), (2, 10435984), (4, 5217992), (8, 2608996), (13, 1605536), (16, 1304498), (26, 802768), (32, 652249), (52, 401384), (104, 200692), (131, 159328), (208, 100346), (262, 79664), (383, 54496), (416, 50173), (524, 39832), (766, 27248), (1048, 19916), (1532, 13624), (1703, 12256), (2096, 9958), (3064, 6812), (3406, 6128), (4192, 4979)]