21753860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{131}}^1$

素因数の和:201

約数の個数: 72

約数和(自身を含む): 50694336

約数和(自身を除く): 28940476

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 38, 46, 76, 92, 95, 115, 131, 190, 230, 262, 361, 380, 437, 460, 524, 655, 722, 874, 1310, 1444, 1748, 1805, 2185, 2489, 2620, 3013, 3610, 4370, 4978, 6026, 7220, 8303, 8740, 9956, 12052, 12445, 15065, 16606, 24890, 30130, 33212, 41515, 47291, 49780, 57247, 60260, 83030, 94582, 114494, 166060, 189164, 228988, 236455, 286235, 472910, 572470, 945820, 1087693, 1144940, 2175386, 4350772, 5438465, 10876930, 21753860]

約数ペア:

[(1, 21753860), (2, 10876930), (4, 5438465), (5, 4350772), (10, 2175386), (19, 1144940), (20, 1087693), (23, 945820), (38, 572470), (46, 472910), (76, 286235), (92, 236455), (95, 228988), (115, 189164), (131, 166060), (190, 114494), (230, 94582), (262, 83030), (361, 60260), (380, 57247), (437, 49780), (460, 47291), (524, 41515), (655, 33212), (722, 30130), (874, 24890), (1310, 16606), (1444, 15065), (1748, 12445), (1805, 12052), (2185, 9956), (2489, 8740), (2620, 8303), (3013, 7220), (3610, 6026), (4370, 4978)]